Assessment of groundwater exploitation in an aquifer using the random walk on grid method: a case study at Ordos, China | Evaluation de l’exploitation des eaux souterraines dans un aquifère en utilisant la méthode de la marche aléatoire sur grille: un cas d’étude dans l’Ordos, chine Evaluación de la explotación de agua subterránea en un acuífero utilizando el método de camino aleatorio en cuadrícula: un estudio de Caso en Ordos, China 采用网格随机游动方法评价含水层地下水开采:中国鄂尔多斯的一个研究案例 Avaliação da explotação de águas subterrâneas em um aquífero utilizando passeio aleatório no método da grade: estudo de Caso em Ordos, China
2018
Nan, Tongchao | Li, Kaixuan | Wu, Jichun | Yin, Lihe
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.
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