Reclamation Construction Research Articles

Environmental risk assessment of coastal dredging based on clustering of meteocean forcing

Dredging and dumping in-situ sediments is a fundamental operation for most coastal engineering projects and coastal defense projects, such as the construction of breakwaters, beach nourishment and land reclamation. Future projections in terms of coastal hazard suggest that coastal protection and land reclamation project will be more and more frequent. In this context, the assessment of the environmental and socio-economic impact of the risk induced by dredging is a fundamental step during both the design stage and the operational management. Most of the standard practices and available risk assessment frameworks rely on the numerical prediction of the sediment plume in the large field driven by coastal circulations forced by tides, winds and waves. In this study, we formulated a new risk assessment framework based on an unsupervised machine learning clustering algorithm, K-means clustering, for generating representative meteocean scenarios subsequently used to force a regional circulation model. Moreover, we introduced three criteria of hazard/risk based on the spatial and temporal evolution of the suspended sediment concentration that explained different environmental impacts and two new methods to synthetically present the risk values. The major improvement of the present framework is that the final probability of risk fully describes the statistics in terms of hydrodynamic and dredging conditions.This framework presents the probability analysis of risk spatial distribution based on representative hydrodynamic conditions and dredging scenarios, which is a major improvement of this study compared with previous risk assessment strategies that were unable to predict quantified dredging risk before field construction. Finally, to demonstrate the potentiality of the risk assessment framework, we applied this methodology to the Hong Kong Water and Pearl River Estuary (China) as a pilot case.

2D Model For Addu City Project - Wave Transformation Over Reef Flat

Van Oord DMC was awarded the Contract for the Reclamation by Dredging and Shore Protection works for land in Addu City by The Ministry of National Planning, Housing and Infrastructure of the Maldives. The Scope of Works consists of the Design and Construction of (among others) Reclamation and Shore Protection Works on various locations in the Addu City atoll. The project execution started in 2022 and has been finalized at the end of 2023. The design of the Shore Protection Works has been verified in 2022 by means of 2D physical model testing in the wave flume of DHI in Denmark. Cross-sections of shore protection works for three different reclamation areas have been tested, where this abstract will focus on 2 locations at the outside of the atoll: Maradhoo and Four Lane Link Road (4LLR). All dimensions given in this abstract are prototype values, unless otherwise specified. The length scale of the both models was selected at 1:30. The foreshore of the 2 tested cross-sections is very typical for atolls, consisting of a relatively shallow reef flat followed by a very steep slope to deep water. The modelled foreshores are presented in Figure 1. This figure also shows the locations of the wave gauges, which were placed both offshore (near the wave generator) and on top of the reef flat (in front of the structure). The tested seabed levels directly at the toe of the 4LLR and Maradhoo structures were MSL-0.70m and MSL-0.40m respectively. The target wave conditions were defined in deep water (in front of the wave generator), with design wave heights (Hm0) between 3.8m and 4.4m and 120% overload conditions. The tested peak wave periods (Tp) varied between 11.9s and 19.7s.

Geospatial Analysis for Delta Evolution of Jeneberang River in Makassar, South Sulawesi, Indonesia

This study aims to document and to elucidate the Jeneberang River delta evolution during 1922 -2022 by analyzing the transport of sediment in and out of the river through erosion and sedimentation. The method used is a geospatial analysis of the delta and river evolution using the Dutch map of 1922 and Landsat long-term data from 1972, 1981, 1991, 2000, 2010, 2020, and 2022 by dividing once every fifty to two years, so the delta pattern changes. The data collection was done by downloading data via Landsat, the data processing was simulated using ArcGIS software, and sedimentation and erosion were estimated. This study shows that the lowest sedimentation occurred in 2002 - 2004 with an area of 6.21 ha, and the highest one in 2004 - 2006 with an area of 34.99 ha. The lowest erosion occurred in 2014- 2016 with an area of 1.08 ha, and the highest in 2006 - 2008 with an area of 22.64 ha. The evolution of the delta occurred due to landform and river migrations. Landform migration occurs gradually starting with the direction of migration relative to the north to relative to the west resulting in the formation of a delta landform with an area of 5349.42 ha. Furthermore, the development of the landform no longer leads relatively north to west, but there is still sediment migration due to tides and sediment supply from rivers resulting in a delta landform with an area of 5586.56 ha. Then landform migration is derived from the river sedimentary supply stalled to the north because of water gate construction which caused the concentration of migration lead to the southern estuary. Tides then became a major factor in the migration, but were not as intensive as before with additional formation with an area of 5655.79 ha. The meandering changes or evolution of rivers occur naturally and are influenced by human activities. The emergence of changes is divided into five periods ranging from changes in the meandering direction to the south to the sedimentation and control of erosion with the construction of sluices and reclamation. Based on the study and by using the Galloway classification, Jeneberang delta is classified as an estuarine delta that is predominantly influenced by tides (tide-dominated) during its formation Keywords: Landsat imagery, delta evolution, Jeneberang River, tide-dominated, South Sulawesi

Formation of working equipment of increased efficiency for earthmoving and transport machines

Problem. The problem is low productivity when performing earthworks by earthmoving machines on long construction sites in road, transport, land reclamation construction, during repair and laying of main pipelines, construction of defense structures, which are related to the development of soil and its lateral transportation due to the predominant use machines of cyclic action. Increasing the efficiency of soil digging by bucket earthmoving and transport machines by reducing soil digging resistance and increasing the volume of soil in the bucket. Goal. Formation of new technical solutions of highly efficient working equipment of earthmoving and transport machines. Methodology. System analysis, classification and synthesis of new effective structural elements for the creation of working equipment of earthmoving and transport machines of increased efficiency. Physical modeling to clarify the physical essence of the work process and the performance of the proposed structures. Results. New technical solutions of cutting, transporting, limiting components for the creation of highly efficient earthmoving and transport machines are proposed. Originality. Combining the process of digging the soil with its simultaneous transportation in the direction with the specified parameters. Practical value. The designs of working equipment of earthmoving and transport machines were proposed with the use of cutting and throwing devices for effective continuous lateral transportation of soil and filling of bucket working bodies.

Land-based physical and biological environmental mitigation measures of a mega port construction in Thailand

It is undeniable that a mega port is important to the nation’s economy and its population. On the other hand, a port construction creates numerous environmental impacts. To achieve sustainable development, environmental mitigation measures need to be strictly followed. Since a mega port is constructed once in many decades, a case study during the port construction, like this article, is very rare. Our article presents how Thailand protects its surrounding environment during the construction of Laem Chabang Port (the biggest container port in the country), phase 3. The phase3 reclamation construction started in May 2021 and is expected to be completed in 2025. However, only land-based physical and biological environmental mitigation measures are presented because of the page limit. The land-based environmental impacts are mostly related to truck driving, truck exhaust, road maintenance and cleanliness, noise, dust, and vibration. This article shows that the joint-venture contractor of the reclamation project realizes the necessity of caring for society and the environment.

Diplomasi Indonesia Di Tengah Persaingan Amerika Serikat dan Cina

There are concerns that make attention in reclamation construction in the South China Sea. Apart from that, the divisions in the field of trade, competition in the context of geopolitics and technology that occurred in the two countries, the United States (US) and China, were considered to be the triggers for the arrival of a new Cold War. The background to the conflict between the two is a form of open and strategic competition carried out in order to obtain the label of the best country in the 21st century. US-China relations were originally in the form of a cooperative framework which then shifted into a strategic and open battle. China considers that the US prioritizes resilience over all the advantages it already has, but now it has begun to decline. Meanwhile, the US considers that China is increasingly terrorizing security, making noise over the prosperity of its citizens, hindering people's values and the value of egoism. From the point of view of the Indonesian state, the crisis in US-China relations needs to be managed through the concept of dynamic equilibrium in order to safeguard its national interests. The research uses a descriptive exploratory type of research method (Mas'oed, 1994:68), which will examine the impact of competition between the US and China on Indonesia's diplomacy strategy. This paper analyzes the increasing US-China competition and its impact on Indonesia's diplomatic strategy. The US-China tensions were caused by a struggle between the two over the goal of becoming the number one strongest figure in the world. The US, which has long been known as a super power country, feels its position is being threatened by the new emerging power China. Countries in the ASEAN region, including Indonesia, as a middle power country, should improve their diplomatic strategies and consider their position. The countries in the region are trying to balance and "play" under the affairs of a number of great power countries.

Analisis Manajemen Inventory Spare Parts Alat Berat Pelabuhan Model Consignment Stock Guna Meminimumkan Total Inventory Cost (TIC) di PT XYZ

ABSTRACT
 PT. XYZ is a service company engaged in the maintenance of port heavy equipment and modification of port heavy equipment as well as procurement of spare parts for port heavy equipment. In 2018 along with improving the work performance of PT. XYZ expands its wings to civil works in the port sector, starting from dock repair work, maintenance of port accessories, construction of structures and reclamation. In a maintenance service company and the provision of spare parts for port heavy equipment, the company's inventory must be guaranteed. at each site PT. XYZ especially PT. X has a limited warehouse, so it must maximize the company's inventory. In the company's existing condition, the amount of inventory still exceeds the number of user requests which will accidentally fill their warehouse and will increase the Total Inventory Cost (TIC). With this problem, TIC depreciation will be carried out with a periodic review policy (R, s, S) and a periodic review policy with a consignment stock inventory system. Based on the above method, the original TIC amounted to Rp. 43,063,451 with the periodic review method of TIC amounting to Rp. 38,318,736 or decreased by 11% and if using the periodic review method with the inventory consignment stock TIC system, the amount was Rp. 36,987,546 or decreased by 13%.

A Novel Sensor for Undrained Shear Strength Measurement in Very Soft to Soft Marine Sediments Based on Optical Frequency Domain Reflectometry Technology.

Due to the short supply of conventional fill materials, such as sand, land reclamation using dredged marine deposits has recently been proposed, in which marine deposits with high water content are blow-filled into reclaiming areas. The strength development of the filled marine soils is of great importance during the sedimentation and consolidation to guide the filling process and construction of reclamation. In this study, a novel sensor based on optical frequency domain reflectometry (OFDR) technology with a simple design was developed for undrained shear strength measurement. The novel sensor consists of an optical fiber and a series of polyoxymethylene coins. Owing to the merits of OFDR technology on high resolution, fully distributed sensing, and immunity to electromagnetic interference, the novel sensor can be used to determine undrained shear strength profiles of very soft to soft marine sediments/soils with good accuracy. The sensor was calibrated in remolded marine deposits with different water contents. The good feasibility and performance of the novel sensor for undrained shear strength measurement were well validated in two physical model tests on marine deposits treated by horizontal drains with vacuum preloading.

Assessment of the impact of artificial island airport reclamation on marine ecosystem health: A case study of the Dalian offshore airport, China

The construction of offshore airports through marine reclamation effectively alleviates the contradiction between urban economic development and the scarcity of land resources. However, it has a negative impact on marine ecosystem. The purpose of this paper is to develop feasible tools to investigate the comprehensive impact of a large offshore airport on marine ecosystem health. Taking the Dalian offshore airport under reclamation construction in China as a case, we established an indicator system and used GIS technology to analyze the spatiotemporal dynamic changes of marine ecosystem health during the reclamation construction. The results show that the impact of the reclamation construction of the Dalian offshore airport on marine benthos and fishery resources was significant, resulting in a substantial reduction of benthos biomass and fish egg density. The ecosystem health index decreased from 0.84 to 0.48, indicating that the reclamation construction has transformed the marine ecosystem from a healthy state to an unhealthy state. Measures such as fisheries resource enhancement and eco-friendly revetment should be taken to improve the ecosystem health upon the completion of the project. The results will provide a reference for the development of an early warning for the ecological impact of other large-scale reclamation projects in the world.

ЭКСПЛУАТАЦИЯ ОРОСИТЕЛЬНЫХ СИСТЕМ КРАСНОДАРСКОГО КРАЯ

The article is devoted to the consideration of issues related to the operation of irrigation systems, in particular, of the Krasnodar Territory, their device, irrigation sources and their service life. The sources of irrigation, which must be carried out on any types of land care activities, have been identified. The methods of combating water filtration from irrigation channels are shown. The illustrations of the schemes of the dam water intake, which is constructed when the required water levels in the river in its natural state are not provided, and the discharge and irrigation network. Basically, in regions where hot, dry climate prevails, there is the greatest need for irrigation. Water losses for filtration from ponds have been identified. Methods of cleaning channels from silting, which causes them great harm, are presented, representing water pollution caused by solid particles of detrital material, in which silt or clay particles predominate. The article showed the components of the irrigation network. In practice, according to climatic conditions, it is used in a wide variety of areas. Such climates are characterized by low rainfall. In the Krasnodar Territory, around the 1970s, together with the construction of state irrigation systems, irrigation on local runoff developed. This construction prevailed mainly in the northern and north-eastern regions. In total, quite a lot of work has been done on the development of land reclamation in many areas, but most of all in the Kanevsky district. Almost all the farms of the district at that time launched the construction of irrigated areas due to the accumulation of local runoff waters in artificial and natural reservoirs. But it should be noted that all these factors and many others have led to significant costs in reclamation construction in the region. Which, in turn, led to a violation of the ecological balance in the regional ecosystem, as well as to the deterioration of the habitat of the animal and plant world of the Kuban.

Состояние и перспективы развития мелиорации в Амурской области

The reclamation complex of the region, after a long period of uncertainty, is among the priorities of agricultural development. The article deals with the problems of land reclamation, which acts as a means of ensuring the sustainable development of the agro-industrial complex of the region, since land reclamation plays a crucial role in increasing the fertility of developed lands and crop yields. However, reclamation systems need constant maintenance. It is noted that forest reclamation is insufficiently developed in the region. The purpose of the study is to analyze the current state of land reclamation in the Amur region. The study was conducted in 2018 – 2021 in the Amur region. It has been established that the majority of reclamation systems are in unsatisfactory condition due to a long service life, lack of repair and maintenance, as well as great wear and tear. As a result of the conducted research, the necessity of restoration and reconstruction of the reclamation systems of the region was established. The ways of development of land reclamation on the basis of restoration, repair, reconstruction and construction of new land reclamation systems are outlined. An example of the reconstruction of the reclamation Gilchinsk drainage system and the results of this reconstruction are given, which are expressed in the fact that agricultural work began to be carried out in optimal agrotechnical terms, regardless of weather conditions, and farmers receive stable high yields of agricultural crops. It was noted that it became necessary to pay attention to the design and construction of land reclamation. The modern approach to the survey of reclamation systems, the main directions of repair of concrete structures of reclamation structures are considered. The subject methods of economics, ecology, principles: diversity of forms are used. To conduct this study, information data from websites and other open sources were used.

Static and dynamic behaviors of granular soil reinforced by disposable face-mask chips

The stock of disposable face masks has climbed steadily due to COVID-19, which results in an urgent worldwide environmental problem. This investigation aims to assess the potential of using waste mask chips (MC) as reinforcement in granular soil. To evaluate the mechanical properties of the mask chips - granular soil mixture (MSM), a series of monotonic and cyclic triaxial tests with different confining pressures and MC contents are conducted. Then, the shear behaviors of MSMs are quantified from both static (strength, stiffness, dilatancy) and dynamic (energy absorption capacity, resilient modulus, deformation) perspectives. Furthermore, based on the static and dynamic indexes, the effects of adding MC into granular soil are comprehensively analyzed. All experimental results indicate that the MSMs exbibit an increase of shear strength and a reduction of shear-induced volumetric dilation, but a decrease in stiffness. The addition of MC also leads to an increase in energy absorption but will not affect the cumulative strain of MSMs. Thus, MC has great potential to be used in the embankment construction of road and railway, backfill or reclamation construction, and so on. This experimental study provides a new perspective and thought on the recycling of waste face masks in civil engineering.

Regional reclamation landscape technical systems: current status and rational use


 
 
 The problems of the current state of possibilities of reconstruction and rational use of regional reclamation landscape technical systems have been considered. It has been noted that for studying the process of their formation and modern functioning GIS-method (GIS-packages SAS.Planet.Release and GoogleEarthPro) were used in addition to field landscape research. The meaning of the concept of “reclamation landscape technical system” as a structure in which interconnected hydraulic structures and water bodies that are necessary to ensure and maintain the optimal operation mode of the reclamation landscape complex has been clarified. The main types of reclamation such as hydraulic, cultural, chemical, agrotechnical and agroforestrytechnical have been partially discribed. The essence of the concept of “hydraulic reclamation” as a set of measures aimed at improving the water- air (waterlogging and dehydration) regime of soils has been considered more detailed. The expediency of resumption of reclamation measures in the territory of Ukraine has been confirmed, as 2/3 of its area is in conditions of unfavorable water regime. This study is focused on the analysis of drainage and humidification systems as the most effective in ensuring the regulation of excessive moisture or its deficit. It has been shown that the peak of reclamation works and construction of reclamation landscape technical systems was observed 1950–1965. The largest irrigation, drainage, polder and drainage-humidification systems in Ukraine have been discribed. It has been found that the decline of reclamation systems began in 1991 and was characterized by a reduction in the area of irrigated and drained lands and the deterioration of their ecological condition. Emphasis has been placed on the study of regional drainage and humidification systems and three stages of their development in Ukraine have been identified. Possible measures for the rational use of reclamation systems on the example of the Trubizh regional drainage and humidification landscape technical system have been proposed. It has been noted that the development of regional plans for the rational use of this system should be based on the analysis of the history of economic development of the Trubizh river basin and taking into account the specifics of the landscape structure of the canal-floodplain type. Reconstruction of the reclamation system has been recommended to conduct in two stages: the first one is based on the modernization of hydraulic structures and the main canal, the second one is based on the internal and landscape structure of the system. The feasibility of partial restructuring of the open network for closed drainage and the creation of temporary drainage channels has been confirmed, which will allow more rational use of resources of the Trubizh reclamation landscape technical system.
 
 

Analysis of the Center Point of Indonesia (CPI) Reclamation Policy of Makassar City in the Environmental Political Perspective

The purpose of this study is to analyze the impacts that arise from the CPI reclamation, viewed from the perspective of environmental politics. From an environmental perspective, the reclamation policy does not have a good impact according to its essence and purpose, it actually increases disaster risk for Makassar City, especially coastal areas, both land and sea. This research was conducted qualitatively in a case study of the CPI reclamation, by conducting in-depth interviews and field observations as well as extracting the necessary data from related sources. The CPI reclamation has attracted the attention of a number of NGOs that have formed an alliance to demand that the reclamation be stopped because it has damaged the surrounding environment and has caused economic and material harm to coastal communities. Fishermen and shellfish seekers totaling 43 heads of families who inhabit a land area of approximately 10 hectares, were evicted by the Southern Provincial Government for the construction of CPI reclamation. The sustainability of the CPI reclamation project is still reaping the pros and cons until now, especially the negative impacts that are generated are not only socio-economic problems but also have an impact on the environment. The reclamation policy actually has a negative impact on the environment, contrary to the essence of the policy itself which should bring goodness to life.

PEMBUATAN MULTIMEDIA COMPANY PROFILE CV. SARANA WIJAYA SEBAGAI MEDIA INFORMASI

Sarana Wijaya is a limited liability company for the procurement of construction goods and services founded by Mr. Tri Pudjiarso and Mrs. Anik Purwamti. On December 21, 2009 in Semarang CV. Sarana Wijaya is located at Jl. West Cinde 9 No. 15 Semarang.The purpose and objective of this company is to run a business that is engaged in establishing and operating companies in the construction of buildings, housing, bridges, roads, railways, dams, reclamation, dredging, docks, drainage, and landscaping. (landscaping) and interior design.The research methodology used by the author is desriptive research type and the research specifications used by the author are descriptive qualitative research. The data source used by the author is the premier data source

Time factor research of tires tread wear for selfpropelled scraper

Abstract. Problem. The publications analysis about the self-propelled scrapers use on sites of road and reclamation construction is showed that during the performance of working operations there is unacceptable wear of the tires tread as a result of the intensive sliding on the support surface. Over time, the pneumatic tires wear leads to decrease on the durability of the wheeled mover or tire failure as a result of the carcass rupture and the tread delamination. In its turn, the time factor of the tire tread wear depends directly on the duration of the scraper operating cycle, which implements the traction and transport modes. Goal. The life time increasing of the wheeled mover for the self-propelled scraper by reducing the tire tread wear. Methodology. Analytical methods for interaction process research of the pneumatic tires with support surface are used. Mathematical modeling methods were used to determine the time factor of the tire tread wear during scraping. Results. Dependencies for determining the duration of operating cycle components according to the elliptical scheme of scraping organization are presented. Based on the proposed mathematical model, such as takes into account the force, speed and time factors, the fractions of tire tread wear are determined by the components of the scraper operating cycle, which including its maneuvering in the face. It was found that most often the tire tread wear occurs when moving of the soil-loaded scraper. The presented calculation results of the tire life time according to the proposed method are showed the sufficient convergencewith the scraper performance attributes, taking into account only the abrasive mechanism of the tire tread wear. Originality. To determine the life time of pneumatic tires for the self-propelled scraper, as the most fully combined characteristic features of the traction and transport machine, it is proposed to use the preferred mechanism of tire tread wear – abrasive, as well as the deformation models of the pneumatic tire and support surface. Practical value. The use of the proposed method for calculating the tire tread wear will to make the life time forecast of the wheeled mover for the self-propelled scraper at the design stage and to determine the reasonable needs for material and technical means of this machine operation.

Analysis of drainage canal defects and review of canal cleaner designs

The drainage system elements, namely, the canals, lose their initial design characteristics over time. In general, the canals with unstable profiles are often in the reclamation construction. The problems of unstable profiles of the canals are, primarily, related to the physical and mechanical properties of soils, formation of internal mechanical, as well as chemical and biological processes occurring by the action of natural conditions. Maximum stability is characteristic for canals formed in cohesive organic soils, as well as in various kinds of peat with their thickness considerably exceeding the depth of the canal. With insignificant peat thickness above mineral soils, the stability of the drainage canal slopes will be rather insignificant. Wood peats are the most stable among organic soils. The canals laid in sapropelic soils characterized by the natural flow have rather low stability. That is why, the required stability in wet soils can be achieved by removing the excess moisture. The slopes of the canals made in various clays and loams with their large thickness considerably exceeding the depth of the canal have relatively high stability.

ОСОБЕННОСТИ РАБОТЫ НАСОСНЫХ СТАНЦИЙ НА ЗАКРЫТЫХ ОРОСИТЕЛЬНЫХ СИСТЕМАХ

The creation of modern reclamation systems is accompanied by the emergence of new technical solutions, the complexity of the design of individual elements and, as a result, an increase in labor and money costs for their design, construction and subsequent operation. There are also requirements for reducing the construction time of these facilities, and improving the efficiency of agricultural production on reclaimed lands. The creation of modern reclamation systems needs to clarify the traditional methodological approaches to solving a number of problems. In reclamation construction, closed irrigation systems are becoming increasingly widespread, the main elements of which are: a stationary or mobile pumping station, a closed irrigation network and sprinkler equipment. The experience of operating modern closed irrigation systems has shown that due to changes in the operating modes of pumping stations and sprinkler equipment, sharp pressure fluctuations (hydraulic shocks) occur in pipelines during certain periods, which can lead to network destruction, failure of pipeline valves and pumps. Hydraulic engineering and reclamation facilities must meet certain requirements for reliability and environmental safety. First of all, this is achieved by protecting pipelines from an unacceptable increase in pressure that occurs during hydraulic shocks caused by changes in the operation of pumping units. Damage and accidents in the pressure systems of a closed irrigation network can also occur during transients that occur when pumping units are started up in accordance with the work schedule. The purpose of the work is to clarify the calculation justification, design and safe operation of closed irrigation systems with pumping stations.

ОСОБЕННОСТИ РАБОТЫ НАСОСНЫХ СТАНЦИЙ НА ЗАКРЫТЫХ ОРОСИТЕЛЬНЫХ СИСТЕМАХ

The creation of modern reclamation systems is accompanied by the emergence of new technical solutions, the complexity of the design of individual elements and, as a result, an increase in labor and money costs for their design, construction and subsequent operation. There are also requirements for reducing the construction time of these facilities, and improving the efficiency of agricultural production on reclaimed lands. The creation of modern reclamation systems needs to clarify the traditional methodological approaches to solving a number of problems. In reclamation construction, closed irrigation systems are becoming increasingly widespread, the main elements of which are: a stationary or mobile pumping station, a closed irrigation network and sprinkler equipment. The experience of operating modern closed irrigation systems has shown that due to changes in the operating modes of pumping stations and sprinkler equipment, sharp pressure fluctuations (hydraulic shocks) occur in pipelines during certain periods, which can lead to network destruction, failure of pipeline valves and pumps. Hydraulic engineering and reclamation facilities must meet certain requirements for reliability and environmental safety. First of all, this is achieved by protecting pipelines from an unacceptable increase in pressure that occurs during hydraulic shocks caused by changes in the operation of pumping units. Damage and accidents in the pressure systems of a closed irrigation network can also occur during transients that occur when pumping units are started up in accordance with the work schedule. The purpose of the work is to clarify the calculation justification, design and safe operation of closed irrigation systems with pumping stations.

Мелиорация земель как научная дисциплина

Purpose: to present land reclamation as a branch of science. Methods: the classification structure and the main idea of the scientific discipline based on the analysis of scientific publications are substantiated. Results. The subject (agricultural land or land intended for involvement in agricultural circulation), the object (hierarchical reclamation system) and the main research method (systematic approach) of the scientific discipline have been specified. Its structure is represented by the classification of types and kinds of land reclamation, and the main idea is an organized diagram of relationships between methodology, main scientific problems (new generation reclamation systems, perfect reclamation systems, general theory of reclamation systems), management of all types of reclamation systems based on information technologies created with the help of GIS technologies, as well as improvement of reclamation systems. Improvement is carried out with the help of a recreated network of reclamation systems – analogues, developing technologies and means of operation, repair, construction and reconstruction of hydro reclamation and agroforestry reclamation systems, as well as systems of other types or kinds of land reclamation and recultivation. After research, analysis and verification of the data obtained, the regulatory basis governing land reclamation is replenished and updated. The fund of the regulatory basis is made up of informative documents on hydro-reclamation, agroforestry reclamation, agro-reclamation, cultural, technical and chemical reclamation of agricultural lands. Conclusions. The object, subject and main research method of the scientific branch “Land reclamation” have been specified. The structure of this branch of science is represented by the classification of the main types and kinds of land reclamation. The main idea of the discipline lies in the hierarchy of relations of methodology, basic scientific problems, issues of management of land reclamation systems and their improvement.