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Anthropogenic and geogenic influences on peri-urban aquifers in semi-arid regions: insights from a case study in northeast Jaipur, Rajasthan, India
Hydrogeology Journal ( IF 2.8 ) Pub Date : 2021-02-02 , DOI: 10.1007/s10040-021-02301-7
Theresa Frommen , Maike Groeschke , Maximilian Nölscher , Paul Koeniger , Michael Schneider

Rapid urbanization has exerted considerable pressure on groundwater resources in Jaipur, India. Peri-urban areas are particularly affected as the public supply infrastructure often does not reach this fast-growing fringe, which often lacks a planning strategy, leading to an informal water supply based on groundwater. At the same time, the hills and historic reservoirs located in these areas are important for groundwater recharge and, therefore, critical for sustainable groundwater-resource management. To understand the local hydrogeology and the role of anthropogenic influences, a 2-year field study was carried out in northeastern Jaipur. The aim was to develop a conceptual model on which a management concept can be built. The study comprised hydrochemical and stable isotope analyses of water samples, depth-to-water measurements, a leveling survey and geophysical investigations. The study revealed that the groundwater from both the Proterozoic hard rock and the overlying Quaternary alluvial aquifer generally does not meet the Indian drinking water thresholds for nitrate concentration and/or total dissolved solids (TDS). While anthropogenic activities are the main source of quantity problems (declining groundwater levels through overabstraction), the biggest quality problems (nitrate up to 550 mg/L and TDS >500 mg/L) are most likely of geogenic origin and only enhanced by anthropogenic impacts. Quantity and quality aspects improve significantly in areas influenced by recharge from the historic reservoirs, leading to the conclusion that artificial recharge structures may be the way forward to improving community water supply and that groundwater protection should be given priority in these areas.



中文翻译:

人为和地球成因对半干旱地区近郊含水层的影响:印度拉贾斯坦邦斋浦尔东北部案例研究的真知灼见

快速的城市化给印度斋浦尔的地下水资源带来了巨大压力。由于公共供应基础设施常常达不到这个快速增长的边缘地区,边缘地区尤其受到影响,而边缘地区往往缺乏规划策略,导致基于地下水的非正式供水。同时,这些地区的丘陵和历史性水库对于补给地下水很重要,因此对可持续的地下水资源管理也至关重要。为了了解当地的水文地质学和人为影响的作用,在斋浦尔东北部进行了为期两年的实地研究。目的是开发可以建立管理概念的概念模型。这项研究包括对水样进行水化学和稳定同位素分析,水深测量,找平调查和地球物理调查。研究表明,元古代硬岩和上覆的第四纪冲积含水层中的地下水通常不符合印度饮用水中硝酸盐浓度和/或总溶解固体(TDS)的阈值。人为活动是数量问题(通过过度开采降低地下水位)的主要来源,但最大的质量问题(硝酸盐含量高达550 mg / L和TDS> 500 mg / L)最有可能是地源性的,并且只有人为影响才会加剧。在受历史性水库补给影响的地区,数量和质量方面都有明显改善,

更新日期:2021-02-02
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