scholarly journals Predicting the impact of heavy groundwater pumping on groundwater and ecological environment in the Subei Lake basin, Ordos energy base, Northwestern China

2017 ◽  
Vol 49 (4) ◽  
pp. 1156-1171 ◽  
Author(s):  
Fei Liu ◽  
Xianfang Song ◽  
Lihu Yang ◽  
Dongmei Han ◽  
Yinghua Zhang ◽  
...  
Keyword(s):  
Water Diversion ◽  
Ecological Environment ◽  
Lake Basin ◽  
Groundwater Pumping ◽  
Groundwater Levels ◽  
Groundwater Evapotranspiration ◽  
Natural Equilibrium ◽  
Depression Cone ◽  
Groundwater Depression Cone ◽  
The Impact

Abstract Groundwater is increasingly exploited for energy production in arid areas globally, which will inevitably disrupt the natural equilibrium of groundwater and the ecological environment. A groundwater flow model for Subei Lake basin, Ordos energy base, was developed and calibrated to predict groundwater levels' variation and the impact of heavy groundwater pumping on the ecological environment for the period 2010–2039 under two different pumping scenarios. Results showed that rainfall infiltration and groundwater evapotranspiration were the major source/sink terms for the groundwater system. The obvious groundwater depression cone will be formed in the production field at the end of 30 years and the maximum drawdown will be 11.70 m if the waterworks maintains the present situation. However, recovery of groundwater level will be obvious and the groundwater depression cone will disappear as a result of the implementation of the water diversion project. The increased volume of groundwater pumping between the two scenarios was derived from storage depletion, the activated lateral inflow, the captured groundwater evapotranspiration, lateral outflow and discharge into Subei Lake. Groundwater pumping from Haolebaoji waterworks has caused the decline of the Subei Lake and the noticeable degradation of phreatophyte.

scholarly journals Identifying the impact of Energy Base Water Project on groundwater using high-frequency monitoring data in the Subei Lake basin, Ordos, Northwestern China

2016 ◽  
Vol 48 (1) ◽  
pp. 160-176 ◽  
Author(s):  
Fei Liu ◽  
Xianfang Song ◽  
Lihu Yang ◽  
Dongmei Han ◽  
Yinghua Zhang ◽  
...  
Keyword(s):  
Monitoring Data ◽  
Return Flow ◽  
Western Boundary ◽  
Lake Basin ◽  
Water Project ◽  
Groundwater Levels ◽  
Integrated Method ◽  
Phreatic Aquifer ◽  
Groundwater Depression Cone ◽  
The Impact

Groundwater is increasingly exploited for energy production in arid regions, which necessitates a deeper insight into the impact of the enhanced human pressure on the groundwater. This study applied an integrated method (statistical analysis, water table fluctuation method, hydrograph analysis and remote sensing) to identify the impact of Energy Base Water Project on the groundwater in the Subei Lake basin. Groundwater levels in eight observation wells at 30 min intervals during the 2013–2014 period were monitored using automatic groundwater monitoring data loggers. Results showed that precipitation infiltration, irrigation return flow, groundwater pumping and evapotranspiration controlled the hydrodynamics of unconfined groundwater. The average evapotranspiration rates in the Quaternary phreatic aquifer and the Cretaceous phreatic aquifer were 6.15 and 12.48 mm/d. The unusual hourly hydrographs fall into three patterns (mutational, irregular and gradual hydrographs). Different recovery times after being influenced by pumping may be related to the presence of the mudstone lenses. The extent of the groundwater depression cone was qualitatively identified by gradual hydrographs, which may spread from the center area to the western boundary. Only some individual wells from Haolebaoji waterworks had conducted the intermittent pumping activities at random times and caused the decline of the lakes.

scholarly journals Impact Assessment of Eastern Route of South-to-North Water Diversion Project Operation on Water Environmental of Dongping Lake

2021 ◽  
Vol 276 ◽  
pp. 01006
Author(s):  
Yunxiang Bao
Keyword(s):  
Impact Assessment ◽  
Water Environment ◽  
Assessment System ◽  
Water Diversion ◽  
Ecological Environment ◽  
Fuzzy Evaluation ◽  
Water Diversion Project ◽  
North Water ◽  
Dongping Lake ◽  
The Impact

The Eastern Route of the South-to-North Water Diversion Project is a national strategic measure to improve the water supply conditions of the cities along the route, Jiaodong and Huaibei regions. However, the Water Diversion Project not only brings social and economic benefits, but also changes the hydrological situation and ecological environment of water source area, transfer area and receiving area. In this paper, Dongping Lake is selected as the research object. By using the analytic hierarchy process and fuzzy evaluation method, the index system of the impact assessment of the Eastern route project on the water environment of Dongping Lake is constructed, and a multi-level fuzzy evaluation model is established to conduct quantitative and qualitative research on the impacts of hydrology, meteorology, water ecological environment, soil and other aspects as well as ecological and economic compensation. The analysis results show that the operation of the Eastern route project has brought some negative effects on Dongping Lake, mainly reflected in the aspects of soil, ecological compensation, hydrology and meteorology, and the negative effects on the water ecological environment are light. By studying the impact of the Eastern route project on the water environment of Dongping Lake, this paper aims to improve the environmental impact assessment system for the water receiving area of the Eastern Route of the South-to-North Water Diversion Project, and to provide reference for the research on the environmental impact assessment system for other water diversion projects in China.

Study on Artificial Regulation of Water Resources in West of Daqing City

2012 ◽  
Vol 550-553 ◽  
pp. 2510-2514
Author(s):  
Chun Yan Zhang ◽  
Long Cang Shu ◽  
Bo Liu ◽  
Emmanuel Kwame Appiah-Adjei ◽  
Su Li ◽  
...  
Keyword(s):  
Water Resources ◽  
Artificial Recharge ◽  
Groundwater Table ◽  
Water Diversion ◽  
Confined Aquifer ◽  
Visual Modflow ◽  
Supply Source ◽  
Depression Cone ◽  
Over Exploitation ◽  
The Impact

Since the development and construction of Daqing City, groundwater resource has been their main water supply source. However, over-exploitation of the groundwater is causing a series of environmental and geological problems. Thus it is essential to ensure sustainable development of groundwater and control the worsening of groundwater related environmental problems in the City. Practical scenarios of groundwater recovery based on several different water resources artificial regulation scenarios are designed to reduce exploitation after the completion of water diversion from Nen River Expansion Project. These scenarios include three different exploitation reducing scenarios and scenarios of artificial recharge based on reducing exploitation. The simulation results of Visual Modflow indicate that both reducing exploitation and artificial recharge based on reducing exploitation can accelerate the recovery of groundwater table in the confined aquifer. Considering the speed of the recovery of groundwater and the impact of reducing exploitation on domestic, industrial and agricultural utilization of water resources, artificial recharge based on reducing exploitation Scenario B is better. Under this condition, the groundwater table of the confined aquifer in the center of depression cone will be recovered by 5 to 8 m up to the end of 2020.

Groundwater Dynamic Change of Over-Exploited Area Based on Numerical Simulation in Cangzhou City, China

2012 ◽  
Vol 573-574 ◽  
pp. 506-510
Author(s):  
Xue Li ◽  
Guo Min Li ◽  
Peng Peng Zhou ◽  
Ming Li
Keyword(s):  
Dynamic Change ◽  
Scientific Basis ◽  
Water Diversion ◽  
The South ◽  
Groundwater Levels ◽  
Deep Aquifers ◽  
Water Diversion Project ◽  
North Water ◽  
Depression Cone

Long-term excessive extraction of groundwater has caused many environmental and geological problems such as depression cone and land subsidence in the city of Cangzhou, China. In order to analyze the variation of groundwater levels in over-exploited area and predict the evolution after decreasing pumping along with the South-to-North Water Diversion project, a 3-D transient groundwater flow model was established. The results show that several depression cones have formed in shallow and deep aquifers in recent years. In addition, the area of the depression cones would decrease and the centre levels of them would ascend by restrict exploitation of deep groundwater after the implementation of the South-to-North Water Diversion project. The work can provide a scientific basis for reasonable water resources allocation with the South-to-North Water Diversion project in Cangzhou city.

scholarly journals Carbon Dynamics in the Northeastern Qinghai–Tibetan Plateau from 1990 to 2030 Using Landsat Land Use/Cover Change Data

2020 ◽  
Vol 12 (3) ◽  
pp. 528 ◽  
Author(s):  
Jingye Li ◽  
Jian Gong ◽  
Jean-Michel Guldmann ◽  
Shicheng Li ◽  
Jie Zhu
Keyword(s):  
Land Use ◽  
Tibetan Plateau ◽  
Carbon Storage ◽  
Sharp Decrease ◽  
Total Carbon ◽  
Qinghai Lake ◽  
Lake Basin ◽  
Ecosystem Carbon ◽  
Trade Offs ◽  
The Impact

Land use/cover change (LUCC) has an important impact on the terrestrial carbon cycle. The spatial distribution of regional carbon reserves can provide the scientific basis for the management of ecosystem carbon storage and the formulation of ecological and environmental policies. This paper proposes a method combining the CA-based FLUS model and the Integrated Valuation of Ecosystem Services and Trade-offs (InVEST) model to assess the temporal and spatial changes in ecosystem carbon storage due to land-use changes over 1990–2015 in the Qinghai Lake Basin (QLB). Furthermore, future ecosystem carbon storage is simulated and evaluated over 2020–2030 under three scenarios of natural growth (NG), cropland protection (CP), and ecological protection (EP). The long-term spatial variations in carbon storage in the QLB are discussed. The results show that: (1) Carbon storage in the QLB decreased at first (1990–2000) and increased later (2000–2010), with total carbon storage increasing by 1.60 Tg C (Teragram: a unit of mass equal to 1012 g). From 2010 to 2015, carbon storage displayed a downward trend, with a sharp decrease in wetlands and croplands as the main cause; (2) Under the NG scenario, carbon reserves decrease by 0.69 Tg C over 2020–2030. These reserves increase significantly by 6.77 Tg C and 7.54 Tg C under the CP and EP scenarios, respectively, thus promoting the benign development of the regional ecological environment. This study improves our understanding on the impact of land-use change on carbon storage for the QLB in the northeastern Qinghai–Tibetan Plateau (QTP).

scholarly journals Evaluation of Seasonal Groundwater Quality Changes Associated with Groundwater Pumping and Level Fluctuations in an Agricultural Area, Korea

Water ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 51
Author(s):  
Kyoochul Ha ◽  
Eunhee Lee ◽  
Hyowon An ◽  
Sunghyun Kim ◽  
Changhui Park ◽  
...  
Keyword(s):  
Water Quality ◽  
Groundwater Quality ◽  
Groundwater Level ◽  
Irrigation Water ◽  
Agricultural Area ◽  
Water Type ◽  
Quality Changes ◽  
Groundwater Pumping ◽  
Rice Paddies ◽  
Groundwater Levels

This study was conducted to evaluate seasonal groundwater quality due to groundwater pumping and hydrochemical characteristics with groundwater level fluctuations in an agricultural area in Korea. Groundwater levels were observed for about one year using automatic monitoring sensors, and groundwater uses were estimated based on the monitoring data. Groundwater use in the area is closely related to irrigation for rice farming, and rising groundwater levels occur during the pumping, which may be caused by the irrigation water of rice paddies. Hydrochemical analysis results for two separate times (17 July and 1 October 2019) show that the dissolved components in groundwater decreased overall due to dilution, especially at wells in the alluvial aquifer and shallow depth. More than 50% of the samples were classified as CaHCO3 water type, and changes in water type occurred depending on the well location. Water quality changes were small at most wells, but changes at some wells were evident. In addition, the groundwater quality was confirmed to have the effect of saltwater supplied during the 2018 drought by comparison with seawater. According to principal component analysis (PCA), the water quality from July to October was confirmed to have changed due to dilution, and the effect was strong at shallow wells. In the study areas where rice paddy farming is active in summer, irrigation water may be one of the important factors changing the groundwater quality. These results provide a qualitative and quantitative basis for groundwater quality change in agricultural areas, particularly rice paddies areas, along with groundwater level and usage.

Analysis on the Impact of the Status of the Fresh-Old Concrete Bonding Interface on Dam Safety

2013 ◽  
Vol 405-408 ◽  
pp. 816-823
Author(s):  
Tao Huang ◽  
Guo Xin Zhang ◽  
Bo Yang ◽  
Lei Zhang
Keyword(s):  
Internal Force ◽  
Bonding Interface ◽  
Water Diversion ◽  
Gravity Dam ◽  
Safe Operation ◽  
Concrete Dam ◽  
Concrete Crack ◽  
The Status ◽  
North Water ◽  
The Impact

The bonding problem of interface between the fresh and old concrete is one of the main technological difficulties in the Heightening Project of Danjiangkou Dam in the South-to-North Water Diversion Project. At present, no mature experiences or engineering examples are found in China for concrete dam heightening. Because of the external environmental impacts of temperature change, aging and hydraulic fracturing on the interface between the fresh and old concrete, crack is likely to occur, which brings risks to the safe operation of the dam. In this article, the finite element direct force method was used to calculate the internal force. The safety of No. 1 dam monolith was calculated in accordance with the standard method for gravity dam in three conditions of fresh-old concrete bonding interface, i.e., perfect condition, cracked interface and cracked interface with water seepage. Suggestions for their solutions were also provided.

Micro-Scale Flow Simulations and Permeability Estimation of Cleat Networks in Coal

2016 ◽  
Vol 846 ◽  
pp. 42-47
Author(s):  
J. Busse ◽  
S. Galindo Torres ◽  
Alexander Scheuermann ◽  
L. Li ◽  
D. Bringemeier
Keyword(s):  
Gas Flow ◽  
Structural Information ◽  
Porous Matrix ◽  
Groundwater Levels ◽  
Micro Scale ◽  
Wide Range ◽  
Boltzmann Method ◽  
The Impact ◽  
Flow Experiments

Coal mining raises a number of environmental and operational challenges, including the impact of changing groundwater levels and flow patterns on adjacent aquifer and surface water systems. Therefore it is of paramount importance to fully understand the flow of water and gases in the geological system on all scales. Flow in coal seams takes place on a wide range of scales from large faults and fractures to the micro-structure of a porous matrix intersected by a characteristic cleat network. On the micro-scale these cleats provide the principal source of permeability for fluid and gas flow. Description of the behaviour of the flow within the network is challenging due to the variations in number, sizing, orientation, aperture and connectivity at a given site. This paper presents a methodology to simulate flow and investigate the permeability of fractured media. A profound characterization of the geometry of the cleat network in micrometer resolution can be derived by CT-scans. The structural information is fed into a Lattice Boltzmann Method (LBM) based model that allows the implementation of virtual flow experiments. With the application of suitable hydraulic boundary conditions the full permeability tensor can be calculated in 3D.

scholarly journals The use of groundwater crustacean communities as indicators for aquifers quality in the semi-arid region of north-central Chile

2018 ◽  
Vol 1 ◽  
Author(s):  
Sanda Iepure ◽  
Nicolas Gouin ◽  
Angeline Bertin ◽  
Ana Camacho ◽  
Antonio González-Ramón ◽  
...  
Keyword(s):  
Negative Impact ◽  
Groundwater Resources ◽  
Economic Benefits ◽  
Nutrient Loads ◽  
Groundwater Temperature ◽  
Groundwater Levels ◽  
Water Abstraction ◽  
Over Exploitation ◽  
The Impact ◽  
Semi Arid

Chile has large extensions of arid and semi-arid regions throughout the whole country, where the intensive demands and use of water resources, especially groundwater for irrigations and mining activities, increased dramatically over the last decades. The aquifer depletions due to water abstraction for irrigation and nutrient loads, exert major alterations of water quality, groundwater recharge and the natural renewal rate. All these factors diminish the aquifer value for the users and contribute to the degradation of groundwater as environment and habitat for fauna. This intensive use of groundwater resources in Chile brought to significant social and economic benefits, but their inadequate management resulted in negative environmental, legal and socioeconomic consequences. In this study, we aimed at providing a first assessment of environmental alterations of groundwater ecosystems from agricultural watersheds in northern Chile by specifically evaluating the effects of nitrogen and pesticide loads on groundwater communities and identifing the ecosystem service alterations due to agricultural activities. The study has been performed in a glacial aquifer from Coquimbo region; 250 km north of Santiago de Chile, the floodplain of which is dominated by agriculture (fruits tress, vineyards). Due to low regional precipitations (100-240 mm/year) the aquifer is primarily recharged by snowmelt from the Andean chain and surface runoff. The relative groundwater levels, groundwater temperature, chemical analysis of nitrogen and total phosphorus and pesticide concentrations were examined, along with the evaluation of crustacean biodiversity and spatial distribution pattern. Stygofauna taxonomic richness and the presence of stygobites have been related more to groundwater level stability than to chemical water parameters indicating that over-exploitation has a negative impact on habitat suitability for groundwater invertebrates. Groundwater biota assessment is essential in understanding the impact produced by agriculture activities on groundwater as a resource and as ecosystem, a nexus that becomes more and more widely recognized. The rationale and the preliminary results of this study are summarized in the Suppl. material 1.

scholarly journals THE MECHANISM OF ECONOMIC MANAGEMENT IN THE REGIONS OF KAZAKHSTAN TO ENSURE ENVIRONMENTAL SAFETY

2019 ◽  
Vol 7 ◽  
Author(s):  
Laura Igaliyeva ◽  
Saule Yegemberdiyeva
Keyword(s):  
Environmental Management ◽  
Environmental Safety ◽  
Ecological Environment ◽  
Economic Stability ◽  
Economic Management ◽  
Foreign Markets ◽  
Economic Mechanism ◽  
Effective Operation ◽  
National Welfare ◽  
The Impact

This article describes the objectives and methods of ecological environment management and sustainable environmental management at the regional level and with the impact of economic instruments. The optimum solutions to environmental management problems with a view to preserving natural resources and the reduction of risk of harm to the ecological environment were examined. Based on the analysis of conceptual approaches to the formation of the economic mechanism for ensuring environmental safety, the fundamental principles of the formation of this mechanism in Kazakhstan have been determined. On the basis of scientific research, measures are proposed for the effective operation of the economic mechanism of environmental management in Kazakhstan, which ensures the competitiveness of national products in the domestic and foreign markets, overall economic stability and national welfare in general.

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