Scholarlink

<p>The excessive decline of groundwater levels in Lucknow City, India, has created a city-scale groundwater depression cone. Hence, this article presents, a model-based evaluation of the mitigation strategies for the groundwater crisis, including the prohibition of any additional groundwater abstraction beyond 2023 and conjunctive water uses. To achieve this evaluation, a regional-scale, three-dimensional groundwater flow model was calibrated and validated with hydrogeological data from 2004 to 2023. The model was downscaled to Lucknow City using the telescopic mesh refinement (TMR) approach and then used for future projections. For the pre-monsoon season of 2024, the model estimates that 59% of the groundwater abstracted from Lucknow City is contributed by lateral inflow from nearby aquifers, 36% by storage loss, and only 5% from rainfall recharge and river losses. The first baseline scenario, with no further abstraction beyond 2023, reveals that present abstraction rates have crossed the threshold of aquifer resilience. The first scenario predicts groundwater levels in the central area to decline by an additional 18–31&#xa0;m by 2034. The second scenario integrates conjunctive uses of surface water and groundwater in highly stressed central sub-regions, also assuming no further groundwater abstraction. Compared to the first scenario, the second scenario predicts reduction in groundwater level declines of 15–27&#xa0;m in central regions and by 5–15&#xa0;m in other regions (excluding the fringes) by 2034. The strategy implemented in the second scenario results in lower storage loss and less lateral inflow from the surroundings, which gradually approaches a steady-state condition.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Model-based insights into the aquifer resilience and mitigation strategies for the groundwater crisis of Lucknow City, India

  • 期刊论文

  • 发表日期：

    2026年4月15日

查看全文
  • Shashank Shekhar,
  • Vinay Kumar,
  • Suman Kumar,
  • Shresth Tayal

摘要

The excessive decline of groundwater levels in Lucknow City, India, has created a city-scale groundwater depression cone. Hence, this article presents, a model-based evaluation of the mitigation strategies for the groundwater crisis, including the prohibition of any additional groundwater abstraction beyond 2023 and conjunctive water uses. To achieve this evaluation, a regional-scale, three-dimensional groundwater flow model was calibrated and validated with hydrogeological data from 2004 to 2023. The model was downscaled to Lucknow City using the telescopic mesh refinement (TMR) approach and then used for future projections. For the pre-monsoon season of 2024, the model estimates that 59% of the groundwater abstracted from Lucknow City is contributed by lateral inflow from nearby aquifers, 36% by storage loss, and only 5% from rainfall recharge and river losses. The first baseline scenario, with no further abstraction beyond 2023, reveals that present abstraction rates have crossed the threshold of aquifer resilience. The first scenario predicts groundwater levels in the central area to decline by an additional 18–31 m by 2034. The second scenario integrates conjunctive uses of surface water and groundwater in highly stressed central sub-regions, also assuming no further groundwater abstraction. Compared to the first scenario, the second scenario predicts reduction in groundwater level declines of 15–27 m in central regions and by 5–15 m in other regions (excluding the fringes) by 2034. The strategy implemented in the second scenario results in lower storage loss and less lateral inflow from the surroundings, which gradually approaches a steady-state condition.