环境变化下永定河水文条件演变及驱动因素分析——以响水铺河段为例

IF 3.3 2区 农林科学 Q1 AGRONOMY Agronomy-Basel Pub Date : 2023-08-30 DOI:10.3390/agronomy13092289
Yiyang Yang, Siyu Cai, Hao Wang, Ping Wang, Wei Li
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引用次数: 0

摘要

水文条件是水资源和生态系统评价的关键因素。永定河流域有许多灌区,农业用水过度导致了严重的水资源短缺和生态系统破坏。为探讨永定河流域生态水文条件在变化环境下的演变及其驱动因素,本研究以杨河香水浦段为研究区,将水文蚀变指标与变异幅度法(IHA-RVA)相结合,确定了与生态最相关的水文指标(ERHIs),并确定了流域水文变异期。通过计算流域水文变化程度,分析流域生态水文条件演化模式,并利用WetSpa模型定量识别气候变化、水库蓄水量和灌溉引水量对流域水文条件变化的贡献。结果表明:上升速率和下降速率;最大和最小1天流量;最大流量日期;7月流量是最具生态相关性的水文指标。该剖面的变化发生在1982年至1988年之间;除年最大1日流量和年最大落差变化不大外;其他指标变化较小,香水铺断面整体水文变化率较低。影响最大的水文条件变化是灌溉取水量(来自特定灌溉);其次是气候变化和水库蓄水量。研究结果为永定河流域水资源利用和生态管理提供了重要依据。
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Evolution of Hydrological Conditions and Driving Factors Analysis of the Yongding River in a Changing Environment: A Case Study of the Xiangshuipu Section
Hydrological conditions are key factors in the evaluation of water resources and ecosystems. The Yongding River Basin has many irrigated areas, and excessive agricultural water consumption has led to serious water shortages and ecosystem damage. To investigate the evolution of ecohydrological conditions and their driving factors in the Yongding River basin in a changing environment, this study combines indicators of hydrologic alteration with the range of variability approach (IHA-RVA) to identify the most ecologically relevant hydrological indicators (ERHIs) and to determine the periods of hydrological variability in the basin, using the Xiangshuipu section on the Yang River as the study area. By calculating the degree of hydrological alteration, the evolutionary pattern of ecohydrological conditions in the basin was analyzed, and the WetSpa model was used to quantitatively identify the contributions of climate change, reservoir storage, and irrigation water withdrawal to the alteration of hydrological conditions. The results showed that the rise and fall rate; maximum and minimum 1 day flows; dates of maximum flow; and July flows were the most ecologically relevant hydrological indicators for the Xiangshuipu section. Variability of this section occurred between 1982 and 1988; except for the annual maximum 1 day flows and fall rate, which underwent moderate changes; all other indicators exhibited small changes and the overall hydrological alteration of the Xiangshuipu section was low. The most influential change in the hydrological conditions was irrigation water withdrawal (from specific irrigation); followed by climate change and reservoir storage. The results of this study provide an important basis for water resources utilization and ecological management in the Yongding River basin.
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来源期刊
Agronomy-Basel
Agronomy-Basel Agricultural and Biological Sciences-Agronomy and Crop Science
CiteScore
6.20
自引率
13.50%
发文量
2665
审稿时长
20.32 days
期刊介绍: Agronomy (ISSN 2073-4395) is an international and cross-disciplinary scholarly journal on agronomy and agroecology. It publishes reviews, regular research papers, communications and short notes, and there is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental and/or methodical details must be provided for research articles.
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