Isotopic insights on quantitative assessments of interaction of eco- hydrological processes in multi-scale karst watersheds

文献类型： 外文期刊

第一作者： Hao, Zhuo

作者： Hao, Zhuo;Zhang, Qingwen;Gao, Yang;Wen, Wen

作者机构：

关键词： Stable isotope; Moisture sources; Water cycle; Karst watersheds

期刊名称：INTERNATIONAL SOIL AND WATER CONSERVATION RESEARCH （ 影响因子：6.4； 五年影响因子：7.5 ）

ISSN： 2095-6339

年卷期： 2024 年 12 卷 1 期

页码：

收录情况： SCI

摘要： The dynamics of hydrological processes and the storage mechanisms of karst water resources are the most important issues in karst hydrology. The impact of environmental changes on water quantity, and the evaluation and quantification of eco-hydrological processes remain poorly addressed. In this study, high-frequency continuous monitoring in multi-scale karst watersheds in Southwest China combined the approaches of water isotopes and the hybrid single-particle lagrangian integrated trajectory (HYS-PLIT) model to identify the recharge mechanisms between atmospheric vapor, rainfall, surface water, and groundwater, and to reveal the interaction of eco-hydrological processes. The dominant moisture sources in Puding (PD) County were the Indian Ocean (43-69%) and local moisture (24-33%). The d18O and deuterium excess (d-excess) values showed a positive correlation indicating that secondary or sub-cloud evaporation was prominent in the wet seasons. Karst water line-conditioned excess (lc-excess) indicated that karst water interacted with recent precipitation, groundwater, and evaporation across seasons. Owing to its specific hydrogeological structure, surface water and rainwater have a higher contribution rate to groundwater replenishment. The Chenqi stream replenished the Houzhai River mainly in the form of groundwater, with percentages ranging from 38.1 to 93.5% in the wet season, and 47.8-80.1% in the dry season. In the Houzhai outlet, surface water and groundwater interconverted frequently with a percentage of 45.6-49.1%. We believe this is the first systematic study to quantify the supply relationship between water vapor transport, rainfall, surface water and groundwater in the Chinese karst zone, making a significant move forward in the field of karst hydrological processes and improving the effi-ciency of water resource evaluation and management. (c) 2023 International Research and Training Center on Erosion and Sedimentation, China Water and Power Press, and China Institute of Water Resources and Hydropower Research. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序