Sustainable water resources management in the Long Bien district of Hanoi, Vietnam

2012 ◽  
Vol 12 (6) ◽  
pp. 737-746 ◽  
Author(s):  
C. Stefan ◽  
T. Fröhlich ◽  
L. Fuchs ◽  
R. Junghanns ◽  
H. M. Phan ◽  
...  
Keyword(s):  
Artificial Recharge ◽  
Positive Impact ◽  
Groundwater Resources ◽  
Climatic Conditions ◽  
Site Specific ◽  
Resources Management ◽  
Groundwater Levels ◽  
Sustainable Water Resources Management ◽  
High Population Growth ◽  
Local Water

The accelerated industrialization of Hanoi, Vietnam, coupled with a high population growth rate and changing climatic conditions create increasing pressure on the local water balance. Despite abundant precipitations, overexploitation endangers the groundwater resources, which are not able to sustain an adequate water supply. The present paper presents a sustainable approach for balancing the lowering of groundwater levels by increasing the rainwater percolation rates through enhanced infiltration. The efficiency of the method was assessed by a scenario analysis based on hydrological and hydrogeological models. Multi-criteria simulations revealed the optimum infiltration sites by considering technical and site-specific aspects and the positive impact of artificial recharge on seasonal groundwater budget.

scholarly journals Modeling phreatic levels in a rural watershed in Lontras, High Itajaí Valley, SC-Brazil

2020 ◽  
Vol 34 (2) ◽  
pp. 143-155
Author(s):  
Mateus Nascimento Vieira de Melo ◽  
Rodrigo Lilla Manzione ◽  
Adilson Pinheiro ◽  
Gustavo Antonio Piazza ◽  
Edson Torres ◽  
...  
Keyword(s):  
Trend Analysis ◽  
Exploratory Data Analysis ◽  
Groundwater Resources ◽  
Response Relationship ◽  
Southern Brazil ◽  
Resources Management ◽  
Groundwater Levels ◽  
Explanatory Variables ◽  
Daily Evapotranspiration ◽  
Exploratory Data

This study analyzed the behavior of phreatic levels in a rural watershed located the municipality of Lontras, High Itajaí Valley, Santa Catarina, Southern Brazil. Phreatic levels are monitored by 3 wells (PZMC located in riparian forests and PZ2127 and PZ3 in pasture areas). Rainfall and fluviometric level are also monitored. Fluviometric station is located near PZ2127. Daily evapotranspiration was calculated using the Samani method. Monitoring was performed from January 1, 2012 to July 15, 2019, combining 7.5 years of data. An exploratory data analysis and a trend analysis of groundwater levels was performed. Simulation was performed with the PIRFICT model (from December 31, 2014 to January 19, 2016). Trend analysis identified significant decay trends for PZMC and PZ3, and elevation trends for PZ2127. The PIRFICT model presented acceptable adjustments. The errors were low and it was possible to characterize the dynamic impulse response relationship between the explanatory variables and the observed levels. The information obtained from the phreatic levels monitoring and modeling proved to be necessary for the local groundwater resources management, providing support for planning and decision making.

scholarly journals Joint estimation of states and parameters of two-layer coastal aquifers based on ENKF

2020 ◽  
Author(s):  
Xiaohua Huang ◽  
Guodong Liu ◽  
Yu Chen ◽  
Jun Li
Keyword(s):  
Groundwater Resources ◽  
Coastal Areas ◽  
Joint Estimation ◽  
Groundwater Model ◽  
Modified Model ◽  
Resources Management ◽  
Groundwater Levels ◽  
Interactive Operation ◽  
Forecasting Method ◽  
Groundwater Resources Management

Abstract Management of groundwater resources has become a source of heated discussion in coastal hydrogeology. Thus, we introduced Ensemble Kalman Filter (ENKF) into a two-layer confined groundwater model based on the interactive operation between the MATLAB and GMS to investigate the capability of ENKF under the complex conditions and obtain the relatively new forecasting method. ENKF was employed to assimilate and forecast groundwater levels, invert the hydraulic conductivity (K) of the heterogeneous study area, where the initial values of K were obtained by using trial-and-error based on the two-period groundwater levels. After comparing the efficiencies in forecasting groundwater levels among ENKF, the modified model, and the initial model, four major conclusions could be drawn. ENKF converged fast when forecasting groundwater levels and the accuracy was high. Various convergent results would be represented by ENKF when K in different layers was observed in the same error. ENKF performed better than the initial simulation when monitored data subjected to a certain range of interferences. Forecasting accuracy in the middle of the study area could be enhanced by the large improvement degree of K through ENKF. Therefore, this analytical method could be a theoretical reference for groundwater resources management in coastal areas. HIGHLIGHT First employed ENKF into a two-layer confined coastal model; modified groundwater model by ENKF; provided the theoretical reference for groundwater resources management in coastal areas.

scholarly journals Groundwater Recharge Planning Using Field Survey for Talupula Mandal in Anantapur District, Andhra Pradesh, India

2021 ◽  
Vol 20 (5) ◽  
Author(s):  
K. Nagamani ◽  
Prabhu Dass Batvari ◽  
S. Packialakshmi ◽  
C. Sai Kumar Reddy ◽  
B. Anuradha
Keyword(s):  
Rural Areas ◽  
Andhra Pradesh ◽  
Field Survey ◽  
Groundwater Resources ◽  
Primary Source ◽  
Groundwater Potential ◽  
Climatic Conditions ◽  
Groundwater Potential Zones ◽  
Groundwater Levels ◽  
Groundwater Availability

Groundwater is essential to the sustainability of India’s environment, economy, and living conditions because it isn’t just the primary source of domestic supply of water in rural areas, but it is also the major and most productive origin of the water. The increased demand for groundwater as a result of reduced rainfall has put a strain on groundwater resources in areas where groundwater is the primary supply of water. The main aim of this study is to identify and explore the groundwater potential zones in Talupula Mandal of 280.3 km2 in Ananthapur district in Andhra Pradesh, India with semi-arid climatic conditions. Based on the field survey approach, groundwater availability is found out in the villages. Schlumberger Vertical Electrical Sounding (VES) survey technique was used to discover the resistivity and thickness of the unmistakable layers. It was carried out in 18 randomly selected sites where groundwater plays an important role in agricultural and domestic use. The thickness and resistivity of first- and second-layer crack sites of the various layers were separated from ground data using IPI2WIN programming. Using software, graphs were plotted and groundwater potential zones were identified for recharging the groundwater. Based on the results, different models of recharge structures for the study area are identified and recommended. Hence the management of groundwater paves the way for sustainable groundwater levels.

scholarly journals Detection of Groundwater Levels Trends Using Innovative Trend Analysis Method in Temperate Climatic Conditions

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2129
Author(s):  
Ionuț Minea ◽  
Daniel Boicu ◽  
Oana-Elena Chelariu
Keyword(s):  
Trend Analysis ◽  
Groundwater Level ◽  
Global Climate ◽  
Groundwater Resources ◽  
Winter Season ◽  
Climatic Conditions ◽  
Positive Trend ◽  
Analysis Method ◽  
Groundwater Levels ◽  
Innovative Trend Analysis

The evolution of groundwater levels is difficult to predict over medium and long term in the context of global climate change. Innovative trend analysis method (ITA) was used to identify these trends, and ITA index was calculated to measure their magnitude. The data used are sourced from 71 hydrogeological wells that were dug between 1983 and 2018 and cover an area of over 8000 km2 developed in the temperate continental climate in the north-eastern part of Romania. The results obtained by applying the ITA show a general positive trend for groundwater level over 50% of wells for winter and spring seasons and annual values. The negative trends were observed for more than 43% of wells for the autumn season followed by the summer season (less than 40%). The magnitude of trends across the region shows a significant increase for spring season (0.742) followed by winter season (0.353). Important changes in the trends slopes and magnitudes have been identified for groundwater level depth between 0 and 4 m (for winter and spring seasons) and between 4 and 6 m (for summer and autumn seasons). The results can be implemented in groundwater resources management projects at local and regional level.

Feasibility of Artificial Groundwater Recharge Structures for Urban and Rural Environment of Ranchi in India using Geospatial Technology

2018 ◽  
Vol 2 (1) ◽  
pp. 28-42 ◽  
Author(s):  
Shanti Mahto ◽  
Anuj Kushwaha ◽  
Siva Subramanian M. ◽  
Nikita Nikita ◽  
T. B. N. Singh
Keyword(s):  
Artificial Recharge ◽  
Groundwater Resources ◽  
Remote Sensing Data ◽  
Drainage Density ◽  
Geographical Information ◽  
Rural Environment ◽  
Runoff Water ◽  
Check Dams ◽  
Exploratory Wells ◽  
Recharge Structures

Artificial recharge plays a prominent role in the sustainable management of groundwater resources. The study has proposed a methodology to viable artificial recharge structure using geographical information system (GIS) and empirical equation techniques for augmenting groundwater resources in the Ranchi urban and rural area of Ranchi District, Jharkhand. The thematic layers for geomorphology, drainage density, order of streams, runoff and trend has been prepared in the GIS environment using convection and remote sensing data. It has been found that the slope and topographic gradient of Ranchi region is one of the major governing factors, which restricts to hold surface water stagnant. Jumar watershed is found as the most feasible watershed for the construction of check dams/percolation tanks followed by Lower Subarnarekha watershed. Out of 15 deeper exploratory wells, 14 are declining. Harmu watershed is found to be in the worst condition in terms of availability of runoff water. Harmu, Kanke, Bariyatu, Namkum, Doranda, Hinoo and Hatia have found as the most suitable locations for installation of RTRWH within the Ranchi urban area. Based on the available field information, check dams are suggested as the most promising artificial recharge structures for Ranchi rural environment.

scholarly journals Depletion of groundwater resources under rapid urbanisation in Africa: recent and future trends in the Nairobi Aquifer System, Kenya

2020 ◽  
Vol 28 (8) ◽  
pp. 2635-2656
Author(s):  
Samson Oiro ◽  
Jean-Christophe Comte ◽  
Chris Soulsby ◽  
Alan MacDonald ◽  
Canute Mwakamba
Keyword(s):  
Negative Impact ◽  
Groundwater Resources ◽  
Climatic Data ◽  
Groundwater Abstraction ◽  
Management Scenarios ◽  
Aquifer System ◽  
Groundwater Levels ◽  
Future Evolution ◽  
Level Data ◽  
Groundwater Assessment

AbstractThe Nairobi volcano-sedimentary regional aquifer system (NAS) of Kenya hosts >6 M people, including 4.7 M people in the city of Nairobi. This work combines analysis of multi-decadal in-situ water-level data with numerical groundwater modelling to provide an assessment of the past and likely future evolution of Nairobi’s groundwater resources. Since the mid-1970s, groundwater abstraction has increased 10-fold at a rate similar to urban population growth, groundwater levels have declined at a median rate of 6 m/decade underneath Nairobi since 1950, whilst built-up areas have increased by 70% since 2000. Despite the absence of significant trends in climatic data since the 1970s, more recently, drought conditions have resulted in increased applications for borehole licences. Based on a new conceptual understanding of the NAS (including insights from geophysics and stable isotopes), numerical simulations provide further quantitative estimates of the accelerating negative impact of abstraction and capture the historical groundwater levels quite well. Analysis suggests a groundwater-level decline of 4 m on average over the entire aquifer area and up to 46 m below Nairobi, net groundwater storage loss of 1.5 billion m3 and 9% river baseflow reduction since 1950. Given current practices and trajectories, these figures are predicted to increase six-fold by 2120. Modelled future management scenarios suggest that future groundwater abstraction required to meet Nairobi projected water demand is unsustainable and that the regional anthropogenically-driven depletion trend can be partially mitigated through conjunctive water use. The presented approach can inform groundwater assessment for other major African cities undergoing similar rapid groundwater development.

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.

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