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Updated: Jun 20, 2025

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评估流域规模的地下水排放:最佳的标志物和因素分析分析

Yun Xia¹, Jun Xiao², Wanzhou Wang¹

¹State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China.

Journal of environmental management

|July 17, 2024

概括

地下水排放在中国的洛斯高原主导着溪流流动,空间差异很大. 结合追踪剂可以更好地量化这些流水和地下水相互作用 (SGI),从而改善水资源管理.

科学领域:

水文学的水文学
环境科学环境科学
地质化学地质化学

背景情况:

流水与地下水的相互作用 (SGI) 对水资源管理至关重要,特别是在干旱地区.
大规模的SGI评估是复杂的,因为标记物的变化和环境条件.

研究的目的:

调查中国洛斯高原 (CLP) 的SGI时空变化和控制因素.
使用各种标记器量化SGI估计中的不确定性.
为选择有效的标记物提供洞察力,用于SGI量化.

主要方法:

在CLP的七个大型流域中利用了多种物理化学和稳定同位素标记物 (δ2H和δ18O).
分析了SGI的时空变化和控制因素.
使用单个和组合指标量化SGI的估计不确定性.

主要成果:

地下水排放到溪水是CLP中占主导地位的SGI,平均排放比率在10%至57%之间.
在流域和流域内观察到排放比率的显著空间变化,受岩厚度和植被的影响.
单个标记物 (同位素或化物) 产生很高的不确定性;结合方法减少SGI量化不确定性.

结论:

地下水排放是CLP河流流的主要组成部分,具有显著的区域和地方差异.
岩厚度和植被覆盖是影响地下水排放速度的关键因素.
结合多个追踪器可以提高SGI量化的准确性,这对于干旱和半干旱环境中的可持续水资源管理至关重要.

关键词:

覆盖面积面积覆盖的面积.一个混合SIAR.稳定的同位素是稳定的.流水与地下水的相互作用不确定性来源不确定性来源

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