The    article    summarizes   the    long-term   experience    of   research    conducted on the development of nature-like technologies on toxic technogenic formations of placer gold mining using a comprehensive assessment of the state  of environmental objects and  an innovative approach. A large amount of waste from the processing of gold deposits located in productive areas withdrawn from the forest lands fund has a negative impact on the components of the ecosphere. In this regard, the purpose of the study was to create a nature-like technology that allows preserving and restoring the productivity of disturbed gold mining lands to ensure their environmental safety. The object of the study was a technogenic system  within the boundaries of the influence of the ceased to exist mining enterprise “Kerbinsky mine” of the P. Osipenko district (P. Briakan) of the Khabarovsk Territory. The research  uses generally accepted  methods, as well as remote sensing  of the Earth (remote sensing), GIS  technologies and  mathematical apparatus. Remote sensing made it possible to identify disturbed territories on various geo-substrates, on multispectral combined images and NDVI index image. Using the QGIS program, an analysis of the dynamics of the transformation of disturbed lands was carried out and their area was calculated. It has been established that  toxic waste from  the enrichment of gold deposits  of the second  hazard class  is a source of pollution of the habitat. Pollutants, migrating from  the  waste  of processing  into  the  components of the  biosphere,  lead  to their large-scale technogenic pollution. Thus, the upper horizon  of technogenic soils accumulates the maximum amount of toxic  elements (mg/kg):  Cu  – 454,  Zn  – 1241,  Pb – 934,  which  is significantly higher  than the background values from 3 to 9 or more times. The calculations of the value of the vegetation index NDVI showed  that  the study area can be classified as highly toxic, belonging to the I category of environmental risks. The NDVI value in the technogenic territory ranged from 0.034 to 0.063, which indicates a weak degree of restoration of forest vegetation. Based on the analysis of the results  obtained, new technological solutions are proposed, confirmed by Patents of the Russian Federation.

The  need for irrigated agriculture in the Republic of Crimea  is due to the natural and  climatic conditions of the territory, which  are characterized by a moisture deficit  with  a high  level of heat  supply. The  purpose  of the research:  an analytical assessment of the current  state  of irrigated agriculture in  the  Republic of Crimea  and  the  success  of its  further development and  reproduction, taking into account  the natural resource potential of the territory and  the existing experience  of positive and  negative approaches to the  use  of irrigated lands. The  object of research  is the  crop production system  of the  agro-industrial complex,  the  subject  of research  is agricultural production on irrigated lands. The research material was the data of statistical reporting of agricultural and water management organizations of the  republic;  publications on the  results  of theoretical study and  practice  of the  use of reclaimed lands, which  are in the open press; as well as the author’s  own work.  The methodological basis  of the  research  was:  information-analytical, systematic and  comparative approaches;  analysis, generalization and synthesis of the obtained data; statistical, expert and heuristic evaluations. The analysis of the development and efficiency of agricultural production on the irrigated lands of the republic revealed significant shortcomings in their  use. Of the total  area of irrigated land, about  24 thousand hectares are irrigated, i.e. no more  than 5%, which  is associated both  with  limited water  resources  and  with depreciation of 80% of fixed  assets,  lack  of necessary  sprinkler equipment, understaffing of pumping stations, etc. It is shown that the natural resource potential of the territory is not fully realized. The average yield of cereals and leguminous crops under irrigation can exceed the actual one by 1.5-2 times. An increase in  the  area  of irrigated lands with  unsatisfactory indicators of alkalinization has  been  established. The  priority measures for rational water  use in the reclamation sector of the economy  of the Republic of Crimea  are presented, including a set of measures for the effective use of water resources of the territory, taking into  account  economic,  social  and  environmental components. Its  implementation is necessary regardless of the renewed supply of Dnieper water to the North Crimean Canal.

Consideration of the main ways and  measures aimed at rational water use through integrated water  resources management (IWRM)  in the Republic of Crimea  is the purpose  of this  paper. The  article  considers world  experience  in  the  application of integrated water  resources  management, on the  basis  of which  the  need  for a complex  task  of effective  water  resources  management has  been justified. The  Republic of Crimea   has  sufficient resources  and  prerequisites for  the  implementation of an IWRM system; in this connection, the article presents  suggestions for the implementation of rational water   distribution,  formed   on  the  basis  of  the  experience   of  foreign  countries.  For  the  successful implementation  of  the  IWRM  principles  in  the  Crimea,  it  is  necessary   to  carry  out  a  number of transformations, which  first of all include the improvement of the current  management structure, as well as the elimination of deficiencies in the water management complex. Within the framework of IWRM, the following actions  are necessary  to improve  the current  water situation: actions  to strengthen the legal and regulatory framework; measures to facilitate the obtaining of reliable and quality information about the water situation; measures to implement IWRM principles, taking into account the fact that water flow through the North Crimean Canal  is resumed. Based  on the foregoing, it follows  that  for the successful implementation of the  intended goals  for  the  implementation of IWRM principles, the  coordination of activities for the rational use of water  resources should be fully  owned  by the government represented by the main stakeholders.

Agriculture in  the  arid  climate of Saratov Zavolzhye is not  able  to provide  high yields  of crops without the use of special  tools to increase  moisture reserves in the root-containing layer of soil.  In  this  regard,  the  development of melioration in  Saratov region  is a strategically important task.  Sprinkling is  the  main way  to increase  the  moisture supply in  the  soil.  The  modern domestic sprinkling machine «Caskade  65T»  is  the  most  suitable for the  realization of this  method. For safe and  effective  operation of «Caskade  65T»SM the  following conditions should be observed:  no objects on the field interfering with  the passage  of self-propelled carts and  the machine as a whole; permissible longitudinal slope of the area up to 4…12% (depending on design  and  length  of the sprinkler machine spans); permissible slopes in the course of machine movement up to 5…12%; difference  in slopes between two adjacent spans  up to 6…14%, while  the total slope of the field along the sprinkler machine must not exceed 7%. It is recommended to set the direction of machine movement in such  a way  that  its ascent to an elevation  occurs along the gentlest slope.

In the last century, irrigated agriculture was used on the territory of the Krasnoyarsk krai on an area of more than 25 thousand hectares and was located mainly in the southern regions of the krai and in the suburban zone. During this period, large closed and open irrigation systems of the engineering type were operating, using  medium-jet and  long-jet sprinklers and  aggregates,  such as «Frigate», «Volzhanka», DDN-70 DDA – 100, etc. On many irrigation systems, watering was carried out in violation of scientifically based irrigation regimes, which led to a violation of the ecological balance in the «water – soil – plant» system, an increase  in the groundwater level on the lower elements of the relief, the occurrence  of the secondary salinization, alkalinization. Currently, irrigated agriculture is episodic,  irrigation systems are taken  out of order, irrigated areas are transferred to a deposit or used in rain-fed agriculture. Monitoring studies were conducted to study the state of humus and the structural and aggregate composition of post-irrigation lands.

The problems of engineering  protection of territories from flooding and flooding by flood waters of rivers are relevant  for many  regions of Russia, including for the Moscow region, where the project of creating  the  science town  «Big Serpukhov» is being  implemented. At  the  same  time,  serious  obstacles arose related  to the flooding  of a significant part  of the territories  of the coastal  zones of the Serpukhov region. Here, most of the agricultural land is in a disturbed and degraded state, it needs to be restored using phytomeliorative measures.  In order to solve the problems and obstacles that have arisen, scientific programs have been drawn up to study  and  survey  the existing  state  of all territories  and  objects of the science city being formed. And also – water bodies (Oka and Nara rivers), which are sources of flooding of coastal areas and  settlements. The results  of the analysis of materials previously  made  by the authors of developments and   inventions  on  the  engineering   protection   of  coastal   territories   and   objects  are  presented   from the point of view of the possibility of their use in solving the problems of flooding the lands of the science city. The developments and inventions that  can be effectively used in solving the issues of engineering  protection and environmental arrangement of the flooded territories of the science city are briefly demonstrated. The results of preliminary studies  confirm the high efficiency and manufacturability of the use of bioengineering systems for the  protection  and  development of coastal  zones.  The  creation  and  implementation of bioengineering systems  based on natural and safe artificial  materials will reduce the material costs of construction and will contribute  to the restoration  of water protection and other disturbed zones in compliance  with environmental requirements. A preliminary assessment of the impact  of the dam  on the Nara  River  in a hydrodynamic accident  on the parameters of the flood zone in the left-bank part of the clusters  and districts of Serpukhov showed that in the implementation of the most likely accident scenario, the emergency situation may be local in terms of material damage and municipal in terms of territoriality.

The  purpose  of the research  is to improve  the design  of a water  outlet,  to calculate a telescopic outlet  with  a round-cylindrical float and  determining the diameter of the movable box float with the given parameters, which should  ensure the reliability of its static position in all possible hydraulic modes  of operation as a spillway with  a round-cylindrical cap  with  a movable position  of the  crest, depending from  the water  level in the receiving  main canal.  The  article  presents  the developed  design of the outlet  structure of the overflow outlet  structure of the telescopic type, which  has a simple design, reliability in operation, structural design  with  minimal hydraulic losses.  The  paper  shows  the results of theoretical studies of the  proposed  design  of a telescopic  outlet  structure, three  variants have  been considered for the  operation of the  movable box,  from  the  above  calculations, the  defining diameter of the float is the mode with  water  overflowing through it when  the maximum flow rate of the pipeline is supplied. The following calculated diameters of the float were obtained;  d_flo = 0.1279 m, d_fl = 0. 0808 m and  d_flt = 0.315m. It is possible  to use standard PVC pipes, the nearest  larger standard outer diameter is d = 0.355  mm.  considering the simplicity of the design  of the telescopic  type water  outlet,  it can be manufactured in the conditions of mechanical workshops of construction organizations.

Currently, there  is  a situation where  the  funds for maintaining the  engineering reclamation systems in working condition are used rationallyenough. One of the reasons is the low level of elaboration of the goals and objectives of the repair or reconstruction of structures, ignoring the requests of organizations directly involved in the operation of hydromelioration systemsand interested in regular, sufficient and  safe  water  supply. The  question of choosing  how  to  restore  objects  is  of paramount importance. On each hydro-reclamation system,  a detailed analysis can identify the so-called «bottleneck», the  elimination  of  which,  which   requires   relatively  insignificant  costs,  can  significantly  increase the productivity of the HMS. An algorithm for analyzing HMS has been developed  in order to identify the causes of changes  (decreases) in the operational reliability and  performance of the system  that  arose during operation. It  has  been established that  the  algorithms for analyzing HMS, generally similar in structure, differ  depending on the type of irrigation, the structure of the irrigated areas and the water consumption of the crops grown.  In conditions of a shortage  of financial resources,  in order to increase the  productivity of the  system, instead of major  repairs  or reconstruction, it  is  sometimes possible to limit the elimination of only a part of the problems that  are part of the work during the current  repair of reclamation facilities. Such problems, which  are a «bottle neck of production», in each individual case are determined by a thorough analysis of the work of the HMS. These actions  do not eliminate the need for  major  repairs  or reconstruction, but  they  make  it  possible  to operate  the  HMS with  acceptable performance during the period preceding  the repair.  The developed  algorithm was used in the analysis of a specific object (channel R-3, Maloderbetovsky and  Oktyabrsky district of the Republic of Kalmykia) and showed high efficiency.

The aim of the work was to solve the problem  of increasing the efficiency of identifying large enterprises that pollute natural water from among many water users of the industrial region. For this purpose, artificial neural networks (INS) were used to detect and evaluate the weights of connections between statistical data, which is important for studying the dynamics of water quality formation in conditions of its spatial and temporal variability. The work was carried out on the example of the available 250 measurements of the  concentration of each  of the  four  priority metals at  the  hydro  chemical gates  of the  Iset  River in  the  area of Yekaterinburg. Neural network analysis made  it possible  to detect  the  interdependencies of individual water quality indicators at neighboring sites. At points  above Yekaterinburg (+5.2 km,  target 1), in the city (target 2) and below it (–4 km,  target 3), in total at 3 × 4 × 250 = 3000 points.  It was found, in particular, that  the effect of the nickel  content  in the water  of the gate 2 on the concentration of other metals of the gate 3, especially zinc, is quite high, so that the correlation coefficient is not lower than 0.6. Such results  made it possible to identify the logistical economic ties of water users and simplify the identification of water pollutants by the “water footprint” left by related enterprises. Thus, it is shown that the INS provides the identification of a man-made decrease in water quality against the background of its natural pollution with the same substances. The reliability of the conclusions is confirmed by the ability to satisfactorily predict the water quality of the section located downstream of the river, according to the data for the section located above, as established in the work by predicting water quality using the INS.

The  procedure   for  determining  friction   pressure   losses  in  the  copper  pipeline of constant round section is presented. A description of the laboratory installation and the list of measuring instruments required for its implementation according  to the proposed  algorithm are given.  The  main stages of experimental work include: air supply to the pipeline by centrifugal fan; determination of pipeline geometrical parameters; measurement  of the  air  temperature in  the  room  with  a thermohygrometer, the speed of air movement at the outlet of the pipeline with a thermoanemometer, air pressure drops (losses) in the sections of the rectilinear pipeline  with  a differential pressure  gauge. Based  on experimental data, friction head losses were determined on the investigated section of the pipeline with subsequent assessment of the  error of indirect measurements. The  results  were compared with  theoretical data  (nomograms by I.I. Nikuradze), confirming their reliability and the convergence of the results  was assessed.  Knowledge of such engineering, technical and scientific solutions will make it possible to perform high-quality control of losses  and  pressure  drops  in  pipelines, select  the  necessary  hydraulic equipment (superchargers), and avoid emergencies  during operation of engineering life support systems.

The    purpose    of   the    study   was    to   determine   the    roughness   coefficient of the  main channel bed BP-1  of the  Sarpinskaya watering-irrigation system  (SWIS) and  to compare the  data   obtained with   the  normative values.   The  materials for  performing the  calculations were: an explanatory note to the project of the second stage of the construction of the SWIS, passports of the main and inter-farm channels of the system (2015), a technical report of the operating organization for 2021, data of full-scale measurements of the depths and velocities of the water flow in the considered alignment using the «speed-area» method, the results  of full-scale surveys  of the water supply network and  HTS SWIS, as well as data from GIS maps  and literary  sources. The methodology for calculating the elements of the live section  of the  channels took into  account  the  recommendations of SP  100.13330.2016. The  calculation of the roughness coefficients of the channels was carried out using known dependencies, including the Chezy formula, the  Manning equation, the  dependencies of I.I. Agroskin and  N.N. Pavlovsky. The  elements of the living  section are determined and the values of the roughness coefficient in the considered alignment of the main channel are obtained. At the same  time,  the calculated values  of the roughness coefficient obtained have good convergence (the deviation of the results  does not exceed –2.8%). However, the obtained values  exceed the normative value  of the roughness coefficient  by 1.6-1.64  times,  which  is explained not only by the overgrowth of the channel bed with  aquatic vegetation, but also by the peculiarity of the shape of the cross-section  of this  channel, which  in the area under consideration has a significant width along the bottom. The calculated values of the roughness coefficient obtained indicate the overgrowth of the main canal bed, which was confirmed during field surveys of the water supply network of this canal in the spring of 2022.  In  view  of this,  it  is  necessary  to carry  out  preventive measures in  a timely manner aimed at reducing the additional hydraulic resistance caused by overgrowth of the riverbed with vegetation.

This   paper   considers  the   rationale  for   taking  into   account   and   assessing the  non-stationarity  of  the  development  of  hydrological  processes  in  the  Volga  River   basin   when determining the  parameters of  the  functioning of  the  Volga  water  management  system. The  main purpose  of the study is to identify non-stationarity in the formation of river runoff  and  develop methods for its assessment. The problem  of constructing a dynamic-stochastic model  is solved,  which  takes  into account  the non-stationarity of the formation of river runoff  in different periods of time.  A generalization of the dynamic-stochastic approach for the analysis and evaluation of long-term fluctuations in the inflow of river  waters  of the  Volga  River  near  the  city  of Volgograd   is  made.   The  stochastic relationship between  the  runoff  of adjacent years  is expressed  by the  transition function that  controls  the  Markov process.  Stationarity  (non-stationarity) of long-term fluctuations  in  river  runoff   was  assessed  using the Fisher criterion (homogeneity of sample variances), Student’s criterion (homogeneity of sample means), Kolmogorov-Smirnov criterion   (homogeneity of  samples) and  pair  correlation (presence  of  a  trend). The description of the nature of the flow of hydrological processes is represented by a model  determined by  the  dynamic-stochastic  approach  when   considering  the  non-stationary  process  of  the  annual flow  of the  Volga  River.  Based  on the  application of the  concept  of quasi-stationarity, the  functions of the availability of the annual flow of the Volga River  are obtained, which  are used for a probabilistic assessment of the  inflow  of river  waters  in  the  Volga  basin.  The  analysis of long-term fluctuations of the annual runoff  of the Volga River  made  it possible  to reveal that  the variability of the river runoff of the  studied basin  has  two  components – deterministic and  random. The  deterministic component manifests itself in the change in time of the average value of the flow of the Volga River, and the random component is observed in the irregular annual deviations of the flow from its average value (norm).  This approach is used in the probabilistic assessment of the inflow of river waters in the Volga river basin.

The  purpose  of the research  is to study the contamination of the bottom  sediments of the Ivankovsky reservoir with heavy metals. These deposits  of water bodies are quite sensitive indicators of their  pollution. The most  unfavorable pollutants are the following metals and  trace elements:  As, Cd, Hg, Zn, Pb, Cu, Cr, Co, Ni. According  to the data  of the work carried out in 2021, the trends  in changes in  the  pollution of  the  bottom   sediments of  the  Ivankovsky reservoir  are  considered.  The  content of mobile  forms  of existence  of the  following microelements was  determined: Cd,  Cu,  Pb, Zn,  Cr, Ni and  As. The content  of trace elements by forms  of existence  was determined by the method of A. Tessier, the results of the studies are given in accordance with the assessment by igeo-classes – by the contamination of the sorbent fraction (less than 0.02 mm). The main polluting elements in the mobile forms of the bottom sediments of the reservoir  are cadmium and  lead,  for which  the level of pollution is estimated within the 2nd igeo-class – from weakly to moderately polluted. A picture of both the contamination of the bottom sediments of the Ivankovsky reservoir with  trace elements, and  the distribution and  ratio of their mobile forms  of existence  in the sediments is presented. Elements such as Pb, Zn and  Cr are mainly in a form bound to iron and manganese hydroxides; Co, Cd, Ni, Cr and Cu are mostly in ion exchange and carbonate forms.   Based   on  the  data   obtained, at  present,   the  load  on  the  studied objects  is  not  dangerous. The obtained results  are of scientific  and practical interest  for organizations of geo-ecological orientation, for specialists in the field of environmental protection  and nature management.

The results  of substantiation of the placement of technogenic load under the influence of oil-producing and  oil-refining complexes  on the  territory of the  catchment area  of the  Kama  River using  GIS  technologies are presented. The justification is based  on maps  of groundwater vulnerability. The   research   involved  an  analysis  of  methods  to  assess   the  natural  groundwater vulnerability, as  well  as  the  calculation of  indicators  allowing a  qualitative and  quantitative  assessment using different vulnerability categories  of municipal areas  of the Perm  Kray.  Investigations were carried  out under laboratory conditions on the  content  of chemical elements entering surface  and  ground waters in the territory of the Perm Kray with  runoff  from oil production and  oil industry enterprises. The main areas of high contamination have been identified on the technogenic exposure map. The areas correspond to the oil producing and refining centers of the Perm Kray. According to the results,  Berezniko-Solikamsky, Chaikovsky,  Perm-Krasnokamsky,  Kungursky,  Lysvinsky,  Chusovskoy, Kizelovsky-Gubakhinsky  oil industry complexes have been assigned to such areas.

The purpose of the work is to conduct research  to determine the maximum areas affected by mud flows in the Baksan River  valley  (Central Caucasus). The relevance of the work  lies in the fact that  the objects in the Baksan River  valley  have repeatedly been subjected to the destructive effects of mud flows, which in different years had  different parameters of the affected  areas. The object of the study is the 1967 mud flows caused by an abnormal amount of precipitation. The work uses satellite images of the Corona project before and  after the mud flows and  Sentinel-2 satellite images reflecting the current situation. Satellite images were georeferenced in ArcMap using control points. The boundaries of the mud flow sediment zones were drawn along the characteristic light phototone during the interactive comparison of satellite images. Special attention is paid  to the section of the Verkhny Baksan village, in which several houses were destroyed by mud flows that  descended along the left and right tributaries of the Kyrtyk River (the Dzhugurtau and Syltransu rivers). Mudflow masses were deposited on an area of 0.22 km2  on the outflow cone of the Kyrtyk River and in the floodplain of the Baksan River,  partially destroying the road on its right bank. The area of the debris deposit zone on the outflow cone of the Sagaevsky River and in the floodplain of the Baksan River was 0.18 km2. At the same time, the channel of the Baksan River  was pushed to the right slope of the valley  at a distance of up to 100 m. Subsequent mudflows along the Sagaevsky River did not reach the scale of 1967. It is concluded that  the identified boundaries of the zones affected by mudflows of 1967 can be considered maximum and they must be taken into account when designing objects and protective  structures.

At the present  stage,  the most  important environmental issues  include the problem of preserving biological diversity, which  is especially  relevant for natural landscapes located in urbanized conditions.  In  the  forest  areas  under the  conditions  of  anthropogenic impacts,  the  transformation of the  regional  flora  takes  place,  thereby  it  adapts to  the  action  of environmental factors.  The  aim of the study was to analyze the taxonomic structure of the vascular plant flora of the Forest Experimental Station of the Timiryazev Agricultural Academy (Moscow). Materials on the formation of the floristic  list of the Forest Experimental Station were obtained during inventories of permanent trial ones for the period from  2000 to 2022, as well as route surveys  of the territory in 2019-2022. In addition, a vascular plant download from the GBIF since 2000 was used. The study showed  that  the current  floristic list of vascular plants of the Forest Experimental Station of the Timiryazev Agricultural Academy includes 352 species belonging to 202 genera and 68 families included in five classes. The largest taxa are the families Rosaceae, Asteraceae,   Poaceae,  Lamiaceae, Cyperaceae,  which   account  for  52.3%  of  the  species.  In  the  Forest Experimental Station, 11 species  of vascular plants listed  in  the  Red  Book  of Moscow  were identified. The  fraction of adventitious vascular plants in  the  flora  of the  Forest  Experimental Station includes 99 species  (28.1%  of the  total  number of identified species),  belonging to 66 genera  and  34 families. Among  the  families  of  the  adventitious  fraction, the  most   multispecies  are  Rosaceae  (22  species), Aceraceae (10 species), Asteraceae  (7 species), Pinaceae  (7 species). The proportion of adventitious species does not exceed 30%, so the flora should be considered natural, slightly disturbed. Despite  the high  level of recreation, pollution from  road  transport, the plant communities of the Forest  Experimental Station continue to retain signs of a natural object that correspond to the natural conditions of the Moscow region.

The  aim  of the  study is  to examine the  state  of the  Far  Eastern forests,  causes of their  degradation and  to identify further efforts to stabilize and  improve  the quality of the forest fund for the  foreseeable  future. The  methodological basis  comprises of silvicultural and  ecological  methods for assessing the  impact of various  factors  on the  components of forest  cenoses with  the  establishment of sample plots.  The  main characteristics of the forest  fund of the Far East  are provided in the study. It has been established that  the region’s forests have predominantly protective  and ecologically stabilizing functions. Plantations suitable for industrial exploitation account for less than 40% of the total forest area in the Far Eastern Federal  District. The forest fund is highly deconcentrated, with  the best forest areas located  in the southern and  central  parts  of the region, mainly in the valley  of the Amur River  and  its major tributaries – the Ussuri, Zeya, Bureya rivers and Lake Baikal. At present, the majority of industrially accessible forests has already been developed  and consists  of disturbed low and medium productive forest stands of grade III and IV bonitet with an average reserve of just over 100 m³/ha. The main causes leading to forest degradation are associated with industrial logging and fires. The clear felling most abundant here and subsequent forest fires have resulted in enormous losses of timber mass. The annual area affected by fire ranges from 1.5 to 1.8 million ha with a loss of over 100 million m3  of forest reserves. Attempts to compensate for the loss of forests through reforestation have been largely  unsuccessful. Most of the established forest crops die from forest fires in the first 5 to 10 years after planting. Less than 5% of all artificial plantations survive to maturity. The regeneration of Far East forests requires a transition to a selective logging system and  effective  measures to protect  forests  from  fires.  Natural regeneration of forests,  due  to their  high regenerative potential, is mostly successful, although sometimes through species change.

The research goal was to determine the soil moisture deficiency and the normalizing parameters of moisture compensation for planting seedlings of the pínus sylvéstris culture with  a closed root system  on burning in a dry-steppe climatic zone. The research was carried  out in the southern part of the Barnaul ribbon  of ribbon  pine forests of the Altai  region. Common, productive and  hard-to-reach moisture reserves  in  the  soil  were  determined. The  observations were  carried  out  at  different times and   on  different  elements  of  the  mesorelief. Studies  have   shown   that   the  moisture  parameters of a twenty-centimeter soil layer over the entire  measurement period reach critically small values  on all the mesorelief  elements considered. The maximum natural moisture content was observed in the lowland during July observations. The lowest natural moisture reserve was recorded in September on the southern slope. The maximum moisture deficit was about  16 mm  for a twenty-centimeter layer of the studied soil and  50 mm  for a meter  layer  and  was  determined by the observation period,  as well  as the exposure of the mesorelief. With  artificial reforestation of Pínus  sylvéstris L. in the area of research  by seedlings with  a closed  root system, the  moisture compensation parameters are at  least  70-150  t/ha  for a soil layer of 0-0.2 m and  170-490 t/ha for a layer of 0-1.0 m. The calculated parameters of water  deficiency and moisture compensation in soil layers can be useful  when planning reforestation works.

breeding in the Volgograd region. The objects of research were the woody species Quercusrobur L., Robiniapseudoacacia L., PopulusbolleanaLouche., Populusnigra var. italica Münchh., Catalpa bignonioides, Pinusnigra subsp. pallasiana (Lamb.), Platycladusorientalis (L.) Franco., Piceapungens Engelm. ofdifferentgeographicalorigin. As a result  of the conducted studies, the best result  was  shown  by poplars  and  catalpa  with  a concentration of «Biostim»  at a dose of 2.5 l/ha (20 ml) for cuttings and 20 ml/l for seeds. The concentration of the preparation at a dose of 10 ml / kg (the consumption of the working solution is 1.5-2 l/kg) with soaking of seeds before sowing for 10-20 minutes, followed by drying, was suitable for Robiniapseudoacacia. The concentration of the preparation in a dose of 10 ml / l with soaking of the seeds before sowing  for 10-20 minutes followed  by drying was  suitable for robiniapseudoactation. The worst result  in the test of laboratory germination of seeds was shown  by oak petiolate,  due to the lack of reaction of seeds to processing  and their mold  formation. In coniferous  species, the best result  was shown by Crimean pine with a concentration of the preparation«Biostim» of 10 ml / l and 2.5 l / ha. The germination of spruce  and  thuja seeds  was  weak.  According  to the  results  of the  test  of the  preparation «Biostim» on seedlings and seeds in a nursery on dark  chestnut soils, the best result  was shown  by seedlings of poplar and catalpa  species with  a concentration of «Biostim» at a dose of 2.5 l/ha and 20 ml/l for seeds. Additional top dressing with poplar preparation proved to be effective, after which good growth, development and leafing of plants were observed. Seedlings and seeds of eastern thuja and blue spruce after additional processing grew and developed satisfactorily, subsequently their drying and loss was observed, which makes the topic of testing biostimulators of growth on conifers is promising for further research.

The  results   of  a  study of  the  state  of  birch  tree  stands of  the  «Zatyumensky» ecopark  are presented using  indicators of sanitary condition, relative  living  condition, relative  height and  a comprehensive assessment indicator. It is established that  according  to the indicators of sanitary and  relative   living   condition, birch  stands in  all  test  areas  are  characterized as  weakened. There is a general  pattern of increasing the  number of severely  weakened and  drying trees  and  decreasing the  number of healthy trees  with  an  increase  in  recreational impact. In  the  area  of active  visitation, the number of severely weakened and  dying  trees is 2-9 times  greater,  and  the number of healthy trees on average is 3-4 times less in comparison with the zones of moderate and weak visits. The number of dead trees decreases by 2-5 times  as the tree stand is removed  from the object of linear recreation. The analysis of the types of damage to birch tree trunks showed  that  the most common are mechanical damage to tree trunks and  the  presence  of fruit  bodies  on tree trunks. The  largest  number of trees  with  mechanical damage is noted in the area of active visitation – up to 14% of the total number of trees, which  is 4-8 times higher than the same indicator in the zone of moderate and weak visits.  The largest number of trees with fruit  bodies on the trunks is noted  in the area of weak  visits  – up to 7% of the total number of recorded trees. The  largest  number of trees with  fruit  bodies  on the trunks is noted  in the area of weak  visits  – up to 7% of the total number of recorded trees. In order to prevent  the degradation of birch plantations of the «Zatyumensky» ecopark and increase their sustainability, a number of forestry measures have been proposed, in particular, temporary fencing of forest areas that are in critical condition for the period of their restoration; carrying out landscape felling  in order to rejuvenate tree stands and  create recreationally attractive and sustainable landscapes of semi-open type, etc.