Assessment of groundwater exploitation in an aquifer using the random walk on grid method: a case study at Ordos, China

Sustainability has been one of the key criteria of effective water exploitation. Groundwater exploitation and water-table decline at Haolebaoji water source site in the Ordos basin in NW China has drawn public attention due to concerns about potential threats to ecosystems and grazing land in the ar...

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Bibliographic Details
Published in:Hydrogeology journal 2018-08, Vol.26 (5), p.1669-1681
Main Authors: Nan, Tongchao, Li, Kaixuan, Wu, Jichun, Yin, Lihe
Format: Article
Language:English
Subjects:
Aquatic Pollution
Aquifers
Case studies
Computer programs
Computer simulation
Confined aquifers
Earth and Environmental Science
Earth Sciences
Ecosystems
Exploitation
Geology
Geophysics/Geodesy
Grid method
Groundwater
Groundwater management
Groundwater table
Head
Hydrogeology
Hydrology/Water Resources
Impact analysis
Mathematical models
Modelling
Random walk
Rangelands
Sustainability
Waste Water Technology
Water Management
Water Pollution Control
Water Quality/Water Pollution
Water table
Water wells
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Summary:Sustainability has been one of the key criteria of effective water exploitation. Groundwater exploitation and water-table decline at Haolebaoji water source site in the Ordos basin in NW China has drawn public attention due to concerns about potential threats to ecosystems and grazing land in the area. To better investigate the impact of production wells at Haolebaoji on the water table, an adapted algorithm called the random walk on grid method (WOG) is applied to simulate the hydraulic head in the unconfined and confined aquifers. This is the first attempt to apply WOG to a real groundwater problem. The method can not only evaluate the head values but also the contributions made by each source/sink term. One is allowed to analyze the impact of source/sink terms just as if one had an analytical solution. The head values evaluated by WOG match the values derived from the software Groundwater Modeling System (GMS). It suggests that WOG is effective and applicable in a heterogeneous aquifer with respect to practical problems, and the resultant information is useful for groundwater management.
ISSN:1431-2174
1435-0157
DOI:10.1007/s10040-018-1762-x