scholarly journals Groundwater management zones and their groundwater water level thresholds in the Tongliao plain

2021 ◽  
Author(s):  
Lingjia Yan ◽  
Xin He ◽  
Chuiyu Lu ◽  
Qingyan Sun ◽  
Chu Wu
Keyword(s):  
Groundwater Management ◽  
Groundwater Level ◽  
Local Development ◽  
Groundwater Resources ◽  
Scientific Basis ◽  
Groundwater Depth ◽  
Management Zones ◽  
Production Area ◽  
Administrative Units ◽  
Over Exploitation

Abstract The West Liao River (WLR) basin located in Inner Mongolia, is an important food production area in China. In recent years, the problem of groundwater over exploitation has become increasingly prominent in the basin due to the expansion of agriculture. This paper developed adaptive management initiatives of the local groundwater resources using Tongliao, located in the east part of the WLR basin, as a case study. Groundwater management zones were divided based on hydrogeology, precipitation, land use, the groundwater over exploitation areas, groundwater depth, and the administrative units (Banners/ Counties/ Districts). The Tongliao basin was divided into 21 management zones. Subsequently, assessment rules for determining groundwater level thresholds in each groundwater management zone were developed based on groundwater observation conditions and the current groundwater depth. Based on the assessment rules, in 2020 the management threshold of groundwater level for each zone were determined. The results provided a scientific basis for the ‘Water Availability Based Local Development Initiative’ in the Tongliao plain.

Characteristics in the Spatiotemporal Variation and Periodic Evolution of Groundwater in the Xining Area of China, Eastern Qinghai–Tibet Plateau

2021 ◽  
Author(s):  
Huanhuan Li ◽  
Runze Zhan ◽  
Yudong Lu ◽  
Bao Zhou ◽  
Jing Wu
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Time Scales ◽  
Groundwater Level ◽  
Groundwater Resources ◽  
Periodic Variation ◽  
Morlet Wavelet ◽  
Groundwater Depth ◽  
Tibet Plateau ◽  
Qinghai Tibet Plateau

Abstract Groundwater, an important source of water, has profound effects on global human survival and production. The spatiotemporal characteristics of groundwater and the periodic variation law of different time scales must be analyzed to grasp the dynamic situation of groundwater and provide scientific guidance for the rational utilization and management of groundwater resources. In this study, the temporal and spatial variability and periodicity of groundwater level were studied in the Xining region of the eastern Qinghai–Tibet Plateau China using traditional statistical method, geographic information system and Morlet wavelet analysis. Results show that the groundwater dynamics in the study area are mainly controlled by three factors, namely, the amount of river water infiltration, discharge from the groundwater, and artificial exploitation. The aforementioned factors can be divided into three dynamic types according to their combination relationship: hydrological, hydrological exploitation, and runoff-discharge types. The groundwater depth showed a trend of first increasing, then stabilizing, and finally decreasing from 1980 to 2020. The analysis in spatial variability demonstrated that the groundwater depth in different periods has a great spatial difference, with a moderate spatial variation intensity. Moreover, the spatial correlation of groundwater in the abundant season is lower than that in the dry season, which is mainly caused by the strengthening of artificial exploitation. The groundwater depth in the Xining region presents a pattern of deep in the south and east and shallow in the north and west by Kriging interpolation of spherical model in geographic information system. Meanwhile, the inter-annual groundwater has continued to decline since the chronic overexploitation between the 1960s and 2000s, with a maximum cumulative depth of 15 m. Then, the amount extraction had been further reduced, and rainfall had significantly increased in recent years. Accordingly, the cone of depression has undergone an evolutionary process from an expansion period to a stable period to a shrinking period. Furthermore, the annual groundwater level of most monitoring wells in study area has the same multi-year scale time variation characteristics with an evident regular periodic variation on the 9-14a and 17-25a time scales by using Morlet wavelet transform analysis. The temporal sequence of groundwater from 1980 to 2020 has the first and second main periods of 12a and 21a. In accordance with the two time-scales, the groundwater level will continue to rise in the short term in the future, which provides a scientific theoretical basis for the long-term sustainable development of groundwater resources and government decision-making.

Determination of "Double Control" Management Threshold Value for Groundwater Based on GMS -- A Case Study of Changchun City, Jilin Province

2020 ◽  
Author(s):  
Linlin Qi ◽  
Xiaoying Zhang ◽  
Zhenxue Dai ◽  
Sida Jia ◽  
Funing Ma
Keyword(s):  
Groundwater Management ◽  
Groundwater Level ◽  
Groundwater Resources ◽  
Threshold Value ◽  
Jilin Province ◽  
Dual Control ◽  
Changchun City ◽  
Control Management

<p>Determination of "Double Control" Management Threshold Value for Groundwater Based on GMS -- A Case Study of Changchun City, Jilin Province</p><p>Linlin Qi<sup>1</sup>, Xiaoying Zhang<sup>1</sup>, Zhenxue Dai<sup>1</sup>, Sida Jia<sup> 1</sup>, Funing Ma <sup>1</sup></p><p>（1. College of Construction Engineering, Jilin university, Changchun 130021, China）</p><p>Groundwater is an essential controlling factor for economic and social development, human survival and good ecological environment. Many areas use groundwater as a regular source of water. However, with the development of economy and society, water pollution problems keep emerging, water resources crisis is increasingly serious, especially in the northern water resources shortage areas, so groundwater management is particularly important. It is no longer possible to objectively reflect the groundwater safety situation in a certain area by controlling the amount of groundwater mining or the groundwater level. Therefore, it is necessary to construct the groundwater “dual-control” management mode. However, the foundation of “dual-control” management is to establish the mathematical relationship between the groundwater control level and the amount of groundwater mining. Taking Changchun city in Jilin province as an example, the study area was divided into different management zones, and the threshold value about the groundwater level and the amount of groundwater mining were determined by analytical method. Then using GMS software to establish a model of groundwater resources in the study area. After identification authentication model to simulate the groundwater resources and the relationship between the groundwater table, ultimately determine the threshold value of groundwater level and water quantity under dual control management in this area. It can be used as the most intuitive data of groundwater dual control management and control. With the groundwater protection as the starting point and the sustainable utilization of resources as the goal, it will be the focus of future research in China to establish the groundwater management mode of "water level" and "water quantity", in order to make the groundwater management more flexible, controllable and scientific.</p>

scholarly journals ASSESSMENT OF SPATIO-TEMPORAL FLUCTUATIONS IN GROUNDWATER LEVEL AND ITS IMPACT ON TUBEWELL ENERGY NEXUS

2020 ◽  
pp. 161-165
Author(s):  
Hafiz M. Awais ◽  
Aamir Shakoor
Keyword(s):  
Water Table ◽  
Groundwater Level ◽  
Groundwater Resources ◽  
Management Strategies ◽  
Canal Water ◽  
Shallow Water Table ◽  
Total Cost ◽  
North East ◽  
Spatio Temporal ◽  
Over Exploitation

Over exploitation of groundwater to fulfill the crop water requirements due to insufficient canal water supply can pose a major threat of water table lowering in semi-arid regions like Pakistan. So, it is necessary to analyze the seasonal groundwater level variations for appropriate management strategies to sustainable groundwater use. Water table declining has adverse economic impacts on total cost of agricultural inputs, as more than 50% of irrigation demand is being fulfilled from groundwater resources. Therefore, this research was aimed to draw the groundwater level zones and to determine the impacts of lowering water table on tubewell energy nexus in district Hafizabad, Pakistan. Water table depth was categorized in three zones i.e., shallow (<10 m), moderate (10-15 m) and deep (>15 m) for years 2003, 2008 and 2013. It was found that water table was shallow on north-east boundary, moderate on the Centre and deep on west-south boundary. During the study period, the area under shallow water table zone reduced from 38.6 to 23%, moderate area expanded from 52.3 to 59.2% and deep area increased from 9.1 to 17.9%. The difference between total cost of shallow and moderate water table was minor. The total cost (construction and operational) of tubewell for 36 m deep water table was 3 times higher than shallow depth (9 m). Thus, lowering of water table should be controlled by increasing share of canal water in deeper zone and introducing artificial recharge methods

Distributed Groundwater Level Remote Centralized Monitoring and Warning System

2012 ◽  
Vol 546-547 ◽  
pp. 1130-1135
Author(s):  
Zhi Wei Zhao
Keyword(s):  
Groundwater Level ◽  
Groundwater Resources ◽  
Warning System ◽  
Scientific Basis ◽  
Sustainable Utilization ◽  
Transmission Network ◽  
Centralized Management ◽  
Monitoring Center ◽  
Monitoring Software ◽  
Level Monitoring

The overexploitation of groundwater has caused many serious hydrological geological disasters in the world wide. In order to solve this subject, a groundwater level monitoring system which adopts C/S architecture design and is composed of a monitoring center, transmission network and monitoring terminals is proposed. The monitoring center is made up of a computer with professional monitoring software. The monitoring terminals are arranged at different area as required, and access Internet to transmit data to remote monitoring center server through GPRS net work. The monitoring center server is responsible for receiving, processing, storage, display and analysis the data about groundwater from monitoring terminals. The experimental results show that the system is stable, high precision, stability and timeliness of features, and realizes the automatic collection and centralized management of groundwater monitoring data that provides a reliable scientific basis for sustainable utilization development of groundwater resources and geological hazards forecasting.

scholarly journals Analysis on the Effect of Groundwater Overexploitation Control in Water receiving region of the First Phase of the South-North Water Transfer Project

2018 ◽  
Vol 246 ◽  
pp. 01069
Author(s):  
GAO Yuanyuan ◽  
LI Jia ◽  
HAO Qichen ◽  
YU Chu ◽  
MENG Suhua
Keyword(s):  
Groundwater Level ◽  
Groundwater Resources ◽  
Great Influence ◽  
Water Transfer ◽  
Groundwater Withdrawal ◽  
Monitoring Site ◽  
The South ◽  
North Water ◽  
Groundwater Overexploitation ◽  
Over Exploitation

The South-North Water Transfer Project is playing a more and more important role in ensuring economic and social development and maintaining a good ecological environment for north of China. However, long-term over-exploitation of groundwater has caused a series of ecological and environmental problems. The first phase of the South-to-North Water Transfer Project was successfully passed through in 2013 and 2014. The water supplied by this huge project provided critical water source for implementing groundwater overexploitation control. In order to promote the management and protection of groundwater resources, the overdraft areas had adopted comprehensive measures to reduce groundwater extraction, such as accelerating the construction of supporting projects, shutting down groundwater mining wells, improving the groundwater monitoring station network, and reforming the water resources fees and so on. The urban groundwater overexploitation control work has received good progress. Based on the investigation and statistics of groundwater overexploitation control in the water receiving region of the first phase of the South-North Water Transfer Project, it was found that since the first phase of the South-to-North Water Transfer Project passing though, the water groundwater withdrawal decreased by 15.23×108 m3 by making full use of the water from the South-North Water Transfer Project, including 2.36×108 m3 in Beijing, 0.67×108 m3 in Tianjin, 6.39×108 m3 in Hebei, 3.84×108 m3 in Henan, 1.62×108 m3 in Shandong, and 0.35×108 m3 in Jiangsu, respectively. The number of groundwater withdrawal wells closed was 15202, including 331 wells in Beijing, 582 in Tianjin, 4895 in Hebei, 6213 in Henan, 2012 in Shandong, and 1169 eyes in Jiangsu, respectively. In terms of groundwater level, the trend of continuous decline in groundwater level has been effectively curbed in most areas of the water receiving region, however, in some areas the groundwater level is still declining due to the too large cumulative over-exploitation of groundwater. Shijiazhuang City was selected as typical monitoring site to explain the groundwater overexploitation control effect on groundwater level. The analysis of the monitoring data of typical monitoring sites showed that groundwater overexploitation control has a great influence on the groundwater level change in Shijiazhuang urban area. This study also puts forward some problems and suggestions in promoting the groundwater overexploitation control in the water receiving region, and provides reference for the construction of ecological civilization and national water security.

scholarly journals Seismically induced changes in groundwater levels and temperatures following the ML5.8 (ML5.1) Gyeongju earthquake in South Korea

2021 ◽  
Author(s):  
Soo-Hyoung Lee ◽  
Jae Min Lee ◽  
Sang-Ho Moon ◽  
Kyoochul Ha ◽  
Yongcheol Kim ◽  
...  
Keyword(s):  
South Korea ◽  
Groundwater Level ◽  
Seismic Waves ◽  
Groundwater Resources ◽  
Fluid Pressure ◽  
Water Levels ◽  
Aquifer System ◽  
Groundwater Levels ◽  
Monitoring Wells ◽  
Gyeongju Earthquake

AbstractHydrogeological responses to earthquakes such as changes in groundwater level, temperature, and chemistry, have been observed for several decades. This study examines behavior associated with ML 5.8 and ML 5.1 earthquakes that occurred on 12 September 2016 near Gyeongju, a city located on the southeast coast of the Korean peninsula. The ML 5.8 event stands as the largest recorded earthquake in South Korea since the advent of modern recording systems. There was considerable damage associated with the earthquakes and many aftershocks. Records from monitoring wells located about 135 km west of the epicenter displayed various patterns of change in both water level and temperature. There were transient-type, step-like-type (up and down), and persistent-type (rise and fall) changes in water levels. The water temperature changes were of transient, shift-change, and tendency-change types. Transient changes in the groundwater level and temperature were particularly well developed in monitoring wells installed along a major boundary fault that bisected the study area. These changes were interpreted as representing an aquifer system deformed by seismic waves. The various patterns in groundwater level and temperature, therefore, suggested that seismic waves impacted the fractured units through the reactivation of fractures, joints, and microcracks, which resulted from a pulse in fluid pressure. This study points to the value of long-term monitoring efforts, which in this case were able to provide detailed information needed to manage the groundwater resources in areas potentially affected by further earthquakes.

scholarly journals Artificial Neural Network Optimized with a Genetic Algorithm for Seasonal Groundwater Table Depth Prediction in Uttar Pradesh, India

2020 ◽  
Vol 12 (21) ◽  
pp. 8932
Author(s):  
Kusum Pandey ◽  
Shiv Kumar ◽  
Anurag Malik ◽  
Alban Kuriqi
Keyword(s):  
Neural Network ◽  
Genetic Algorithm ◽  
Artificial Neural Network ◽  
Groundwater Level ◽  
Groundwater Resources ◽  
Uttar Pradesh ◽  
Groundwater Table ◽  
Post Monsoon ◽  
Groundwater Table Depth ◽  
Ann Models

Accurate information about groundwater level prediction is crucial for effective planning and management of groundwater resources. In the present study, the Artificial Neural Network (ANN), optimized with a Genetic Algorithm (GA-ANN), was employed for seasonal groundwater table depth (GWTD) prediction in the area between the Ganga and Hindon rivers located in Uttar Pradesh State, India. A total of 18 models for both seasons (nine for the pre-monsoon and nine for the post-monsoon) have been formulated by using groundwater recharge (GWR), groundwater discharge (GWD), and previous groundwater level data from a 21-year period (1994–2014). The hybrid GA-ANN models’ predictive ability was evaluated against the traditional GA models based on statistical indicators and visual inspection. The results appraisal indicates that the hybrid GA-ANN models outperformed the GA models for predicting the seasonal GWTD in the study region. Overall, the hybrid GA-ANN-8 model with an 8-9-1 structure (i.e., 8: inputs, 9: neurons in the hidden layer, and 1: output) was nominated optimal for predicting the GWTD during pre- and post-monsoon seasons. Additionally, it was noted that the maximum number of input variables in the hybrid GA-ANN approach improved the prediction accuracy. In conclusion, the proposed hybrid GA-ANN model’s findings could be readily transferable or implemented in other parts of the world, specifically those with similar geology and hydrogeology conditions for sustainable planning and groundwater resources management.

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 Research on critical groundwater level under the threshold value of land subsidence in the typical region of Beijing

2015 ◽  
Vol 372 ◽  
pp. 507-510
Author(s):  
Y. Jiang ◽  
J.-R. Liu ◽  
Y. Luo ◽  
Y. Yang ◽  
F. Tian ◽  
...  
Keyword(s):  
Water Level ◽  
Water Table ◽  
Land Subsidence ◽  
Groundwater Level ◽  
Threshold Value ◽  
Scientific Basis ◽  
Good Time ◽  
Linear Regression Models ◽  
Control Plan ◽  
Time Space

Abstract. Groundwater in Beijing has been excessively exploited in a long time, causing the groundwater level continued to declining and land subsidence areas expanding, which restrained the economic and social sustainable development. Long years of study show good time-space corresponding relationship between groundwater level and land subsidence. To providing scientific basis for the following land subsidence prevention and treatment, quantitative research between groundwater level and settlement is necessary. Multi-linear regression models are set up by long series factual monitoring data about layered water table and settlement in the Tianzhu monitoring station. The results show that: layered settlement is closely related to water table, water level variation and amplitude, especially the water table. Finally, according to the threshold value in the land subsidence prevention and control plan of China (45, 30, 25 mm), the minimum allowable layered water level in this region while settlement achieving the threshold value is calculated between −18.448 and −10.082 m. The results provide a reasonable and operable control target of groundwater level for rational adjustment of groundwater exploited horizon in the future.

scholarly journals Eco-Taxonomic Study of Family Poaceae (Gramineae)

2020 ◽  
Vol 10 (2) ◽  
pp. 63-75
Author(s):  
Muhammad Nauman Khan ◽  
Sajjad Ali ◽  
Tabassum Yaseen ◽  
Sami Ullah ◽  
Akhtar Zaman ◽  
...  
Keyword(s):  
Life Cycle ◽  
Rating Scale ◽  
Cynodon Dactylon ◽  
Species Abundance ◽  
Leaf Size ◽  
Research Area ◽  
Scientific Basis ◽  
Grass Species ◽  
Native Flora ◽  
Over Exploitation

Background: The study of species diversity, its conservations and extinction can be done by using systematics in plant biodiversity. Poaceae is a very diverse grass family with great economic importance as it contains crops like rice, maize, oats, wheat, etc. Objectives: The current study was undertaken in district Charsadda during 2017-18 in flowering season to collect different grass species from the area. Methodology: Grass specimens were gathered, preserved, mounted and then identified from the available literature/native flora (Flora of Pakistan). Ecological parameters like habitat, class, life cycle and biological spectra were determined. A total of 51 taxa comprised of 34 genera, 5 subfamilies and 11 tribes of grasses were collected from the District Charsadda. The subfamily Panicoideae was the leading family with highest number of genera, taxa and tribes, followed by Pooideae. Results: The biological spectrum showed that in the life-form class, therophyte had the highest number of species 32 (62.74%), followed by hemicryptophyte having 13 species (25.49%). In the Leaf size class, microphylls were dominant with 24 species (47.05%) followed by nanophylls having 14 species (27.45%). The adaptational survival of plants showed that 32 species (62.74%) were terrestrial and 19 species (37.25%) were amphibious in our study. The Life-cycle class depicted that 33 species (64.70%) were annual, 17 species (33.33%) were perennial and 1 species (1.960%) was annual or perennial. The Palatability class showed that 35 species (68.62%) were highly palatable, followed by less-palatable 11 species (21.56%), non-palatable 2 species (3.921%) and moderately palatable 3 species (5.882%). The Abundant class were determined through species rating scale in ecology Acfor (Abundant Common Frequent Occasional Rare) scale to describe species abundance in a given area; 26 species (50.98%) were occasional, 12 species (23.52%) were frequent, 7 species (13.72%) were rare, 5 species (9.803%) were common and only 1 species cynodon dactylon (1.960%) was abundant in the whole area and present everywhere in the research area in every season. Conclusion: It has been concluded from the study that unwise collection, over-grazing, over-exploitation, over-consumption and overutilization are major biotic factors, which affect the diversity of the grasses in the area and affect the populations’ sustainability on the earth crust. Therefore, the study aims to document and explore wild grasses from the area, which might help in future researches. This survey will be helpful in identifying plant wealth and status for their exploitation on systematic approaches and scientific basis.

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