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

scholarly journals Problem hydromorphic soils in north-east Thailand. 3. Saline-acid conditions, reclamation, improvement and management.

1977 ◽  
Vol 25 (4) ◽  
pp. 263-277 ◽  
Author(s):  
R. Brinkman ◽  
P.J. Dieleman
Keyword(s):  
Water Table ◽  
Management Practices ◽  
Crop Residues ◽  
Monsoon Season ◽  
Soil Surface ◽  
Dry Season ◽  
Shallow Water Table ◽  
Surface Salinity ◽  
Water Losses ◽  
North East

Saline-acid conditions have developed in patches in the irrigated areas on the low terrace in north-east Thailand. There are also traditionally uncultivated, virtually barren, saline-acid strips adjoining higher terrace remnants, in spite of the excess of monsoon rainfall over evapotranspiration. Calculations show that the salts in the shallow groundwater of the low terrace may have originated from rainfall, but that salts in the main rivers are mainly derived from salt beds. The local surface salinity, mainly of NaCl, is caused by continual evapotranspiration during the dry season and locally impeded leaching. The latter is due to a combination of a shallow water-table, slow vertical permeability and in some cases the slight elevation above the normal level of monsoon flooding. The high salt concentrations in and on the soil surface bring originally exchangeable aluminium into solution, which lowers the pH. In extreme cases even some ferric iron is dissolved at the soil surface. Reclamation, improvement and management practices on these soils should include leaching, for example under two rice crops per year; judicious liming, to eliminate most of the exchangeable aluminium but not to exceed the small buffer capacity of these soils; and emphasis on paddy rice, both in the monsoon season, and, irrigated, in the dry season. If, however, dry-season dryland crops are to be grown, physical problems of different kinds may necessitate further land improvement and management practices. These include, principally, lowering and keeping down the water-table, for example by control of irrigation water losses from canals and ditches; ploughing or disking in chopped crop residues with added nitrogen; and locally, chiselling the upper part of a dense subsurface horizon. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Clustering Groundwater Level Time Series of the Exploited Almonte-Marismas Aquifer in Southwest Spain

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1063
Author(s):  
Nuria Naranjo-Fernández ◽  
Carolina Guardiola-Albert ◽  
Héctor Aguilera ◽  
Carmen Serrano-Hidalgo ◽  
Esperanza Montero-González
Keyword(s):  
Time Series ◽  
Groundwater Resources ◽  
Management Strategies ◽  
Groundwater Levels ◽  
Management Plans ◽  
Distribution Parameters ◽  
Hydrodynamic Disturbance ◽  
Over Exploitation ◽  
Hydrodynamic Behaviors ◽  
Guadalquivir River

Groundwater resources are regularly the principal water supply in semiarid and arid climate areas. However, groundwater levels (GWL) in semiarid aquifers are suffering a general decrease because of anthropic exploitation of aquifers and the repercussions of climate change. Effective groundwater management strategies require a deep characterization of GWL fluctuations, in order to identify individual behaviors and triggering factors. In September 2019, the Guadalquivir River Basin Authority (CHG) declared that there was over-exploitation in three of the five groundwater bodies of the Almonte-Marismas aquifer, Southwest Spain. For that reason, it is critical to understand GWL dynamics in this aquifer before the new Spanish Water Resources Management Plans (2021–2027) are developed. The application of GWL series clustering in hydrogeology has grown over the past few years, as it is an extraordinary tool that promptly provides a GWL classification; each group can be related to different responses of a complex aquifer under any external change. In this work, GWL time series from 160 piezometers were analyzed for the period 1975 to 2016 and, after data pre-processing, 24 piezometers were selected for clustering with k-means (static) and time series (dynamic) clustering techniques. Six and seven groups (k) were chosen to apply k-means. Six characterized types of hydrodynamic behaviors were obtained with time series clustering (TSC). Number of clusters were related to diverse affections of water exploitation depending on soil uses and hydrogeological spatial distribution parameters. TSC enabled us to distinguish local areas with high hydrodynamic disturbance and to highlight a quantitative drop of GWL during the studied period.

Understanding groundwater recharge processes in the Sutlej-Yamuna plain in NW India using an isotopic approach

2020 ◽  
pp. SP507-2020-174
Author(s):  
Suneel Kumar Joshi ◽  
Shive Prakash Rai ◽  
Rajiv Sinha
Keyword(s):  
Isotopic Composition ◽  
Groundwater Recharge ◽  
Groundwater Resources ◽  
Management Strategies ◽  
Ground Level ◽  
Return Flow ◽  
Hydrograph Separation ◽  
Canal Water ◽  
Zone Ii ◽  
River Yamuna

AbstractThe isotopic composition of water has been widely used to investigate groundwater dynamics and recharge processes. In the present study, we have analysed the isotopic composition of groundwater, and of Sutlej River, Yamuna River, Ghaggar River and canal water from the Sutlej-Yamuna plain in NW India. We document spatial and depth-related variations in δ18O and deuterium excess (d-excess) values of groundwater in three zones based on topography and slope (zones I–III) from NE to SW. In Zone I, precipitation is the main recharge source for groundwater, as indicated by the isotopic values. We infer mixed recharge from precipitation and irrigation return flow in Zone II. Zone III records depleted δ18O and higher d-excess values in most of the groundwater samples, suggesting active recharge from canals. Further, we have calculated the contribution of canal water in groundwater using the hydrograph separation approach and have also quantified the uncertainty in its estimation. We note significant spatial and depth-related variability in the canal water contribution to groundwater recharge. The canal contribution is as high as 83 ± 10% at 18 m below ground level (bgl) in Zone III, and as low as 5 ± 3% at 43 m bgl in Zone II. The present study provides the baseline data on recharge processes in NW India, which is critical for developing sustainable management strategies for groundwater resources in this region.

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.

scholarly journals Results of a ground water level experimental field with arable crops on clay soil.

1958 ◽  
Vol 6 (1) ◽  
pp. 1-10 ◽  
Author(s):  
J.W. Van Hoorn
Keyword(s):  
Surface Layer ◽  
Shallow Water ◽  
Water Table ◽  
Root Development ◽  
Groundwater Level ◽  
Clay Soil ◽  
Shallow Water Table ◽  
Short Supply ◽  
Arable Crops ◽  
Heavy Clay

On a heavy clay soil with large moisture-retaining capacity, aeration and root development are reduced by a shallow water table, and therefore plant nutrients, in particular N, are in short supply. The effect of the depth of the water table on yield is mainly determined by the different effects of N on crops and by the level of N dressings. The depression in yield caused by a shallow water table can be compensated for by increasing the N dressing. When the water table is shallow there is a decrease in the percentage of large pores and permeability. If the groundwater level is kept at 40 cm throughout the year, the structure of the surface layer deteriorates and tillage becomes difficult. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Construction of spatio-temporal coupling model for groundwater level prediction: a case study of Changwu area, Yangtze River Delta region of China

2021 ◽  
Author(s):  
Liang He ◽  
Manqing Hou ◽  
Suozhong Chen ◽  
Junru Zhang ◽  
Junyi Chen ◽  
...  
Keyword(s):  
Groundwater Level ◽  
Yangtze River ◽  
Prediction Models ◽  
Groundwater Resources ◽  
Temporal Correlation ◽  
Yangtze River Delta ◽  
Dynamic Monitoring ◽  
Yangtze River Delta Region ◽  
Spatio Temporal ◽  
Groundwater Level Prediction

Abstract The dynamic monitoring data of groundwater level is an important basis for understanding the current situation of groundwater development and the utilization and planning of sustainable exploitation. The dynamic monitoring data of groundwater level are typical spatio-temporal sequence data, which have the characteristics of non-linearity and strong spatio-temporal correlation. The trend of dynamic change of groundwater level is the key factor for the optimal allocation of groundwater resources. However, most of the existing groundwater level prediction models are insufficient in considering the temporal and spatial factors and their spatio-temporal correlation. Therefore, construction of a space–time prediction model of groundwater level considering space–time factors and improvement of the prediction accuracy of groundwater level dynamic changes are of considerable theoretical and practical importance for the sustainable development of groundwater resources utilization. Based on the analysis of spatial–temporal characteristics of groundwater level of the pore confined aquifer II of Changwu area in the Yangtze River Delta region of China, the wavelet transform method is used to remove the noise in the original data, and the K-nearest neighbor (KNN) is used to calculate the water level. The spatial–temporal dataset and the long short-term memory (LSTM) are reconstructed by screening the spatial correlation of the monitoring wells in the study area. A spatio-temporal prediction model KNN-LSTM of groundwater level considering spatio-temporal factors is also constructed. The reliability and accuracy of KNN-LSTM, LSTM, support vector regression, and autoregressive integrated moving average model are evaluated by a cross-validation algorithm. Results showed that the prediction accuracy of KNN-LSTM is 20.68%, 46.54%, and 55.34% higher than that of other single prediction models.

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 Future Projected Groundwater Level Trend Analysis using GIS Techniques

2020 ◽  
Vol 9 (4) ◽  
pp. 1286-1294
Keyword(s):  
Trend Analysis ◽  
Urban Sprawl ◽  
Groundwater Level ◽  
Groundwater Resources ◽  
Level Fluctuation ◽  
Gis Techniques ◽  
Groundwater Level Fluctuation ◽  
High Population Growth ◽  
Spatio Temporal ◽  
Observation Wells

High Population Growth and increase the urban sprawl in earth to less the groundwater resources causes degradation of groundwater Level in India. Water is very important for our life and natural resources. There are various uses of groundwater just as drinking, irrigation, and manufacturing. Today we are facing the shortage of groundwater level. The main goal of study is, because of increase in the population there is increase the number of bore well in earth surface this the reason to declination of groundwater level, so in these study to analysis of spatio-temporal changes in groundwater level fluctuation in Bhopal district in Madhya Pradesh, India. According to censes in Huzur Tehsil, M.P, Bhopal District, in 2001 population is 1429132 and 2011 population is 1834493. Collected the total of 350 observation wells Huzur Tehsil, Bhopal district for point observations. And using the GIS techniques spatial Analysis tools in ArcGIS10.5 to find out different Change of Groundwater Level Fluctuation since period (1996-2015) and using Matlab to generate the GWL (groundwater level) modeling .Generate the Future projected Groundwater level Fluctuation(2016-2050) and Trend Analysis of Groundwater Level (1996-2015) and Future Projected Groundwater level (2016-2050).

scholarly journals Appraisal of Remote Sensing Technology for Groundwater Resource Management Perspective in Indus Basin

2021 ◽  
Vol 13 (17) ◽  
pp. 9686
Author(s):  
Gulraiz Akhter ◽  
Yonggang Ge ◽  
Naveed Iqbal ◽  
Yanjun Shang ◽  
Muhammad Hasan
Keyword(s):  
Remote Sensing ◽  
Groundwater Resources ◽  
Management Strategies ◽  
Indus Basin ◽  
Space Technology ◽  
Water Balance Components ◽  
Remote Sensing Technology ◽  
Sensing Technology ◽  
Grace Satellite ◽  
Spatio Temporal

The dynamic nature and unsustainable exploitation of groundwater aquifers pose a range of management challenges. The accurate basin-wide hydrological assessment is very critical for the quantification of abstraction rates, spatial patterns of groundwater usage, recharge and discharge processes, and identification of critical areas having groundwater mining. This study provides the appraisal of remote sensing technology in comparison with traditionally prevailing tools and methodologies and introduces the practical use of remote sensing technology to bridge the data gaps. It demonstrates the example of Gravity Recovery and Climate Experiment (GRACE) satellite inferred Total Water Storage (TWS) information to quantify the behavior of the Upper Indus Plain Aquifer. The spatio-temporal changes in aquifer usage are investigated particularly for irrigation and anthropogenic purposes in general. The GRACE satellite is effective in capturing the water balance components. The basin-wide monthly scale groundwater storage monitoring is a big opportunity for groundwater managers and policymakers. The remote sensing integrated algorithms are useful tools to provide timely and valuable information on aquifer behavior. Such tools are potentially helpful to support the implementation of groundwater management strategies, especially in the developing world where data scarcity is a major challenge. Groundwater resources have not grown to meet the growing demands of the population, consequently, overexploitation of groundwater resources has occurred in these decades, leading to groundwater decline. However, future developments in the field of space technology are envisioned to overcome the currently faced spatio-temporal challenges.

scholarly journals Analysis of groundwater table variability and trend using ordinary kriging: the case study of Sylhet, Bangladesh

2021 ◽  
Vol 11 (7) ◽  
Author(s):  
Khairul Hasan ◽  
Sondipon Paul ◽  
Tareq Jamal Chy ◽  
Anzhelika Antipova
Keyword(s):  
Developing Countries ◽  
Water Table ◽  
Groundwater Level ◽  
Ordinary Kriging ◽  
Groundwater Resources ◽  
Monitoring Network ◽  
Spatial And Temporal Variation ◽  
Geostatistical Methods ◽  
Management Actions ◽  
Observation Wells

AbstractMany developing countries experience widespread groundwater declination. Sustainable management actions include generation of an accurate groundwater distribution based on an extensive groundwater monitoring network which is often cost prohibiting in the context of a developing country such as Bangladesh. Further, such knowledge is lacking for the Sylhet region where groundwater was documented to be under tremendous pressure. Specifically, the gap in the current literature exists regarding groundwater trends and its areal extent for this region. This paper bridges the gap in research by focusing on trends and spatial and temporal variation of groundwater level changes for this area. This study addresses this problem by creating groundwater level predictions at the ungauged areas using geostatistical methods applied to a detailed set of data. In this study, the spatial variability of annual-average depth to the water table at 46 observation wells in the Sylhet division in Bangladesh is analyzed for 2000, 2005, 2010, and 2015. The geostatistical analysis applies the ordinary kriging method with cross-validation to create the water table maps for the study area. The results indicate a substantial increase in groundwater depths during the studied period from 2000 to 2015 in some locations in the study area. Importantly, this work identifies the vulnerable zones in the area due to the groundwater lowering trend. The study adds to the groundwater management research in developing countries and focuses on the spatial and temporal groundwater variation. The findings from the modeling exercise contribute to identification of the vulnerable areas and therefore help policymakers in making informed decisions to manage groundwater resources in this sensitive region sustainably.

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