Impacts of climate and land-use changes on water yields: Similarities and differences among typical watersheds distributed throughout China
Impacts of climate and land-use changes on water yields: Similarities and differences among typical watersheds distributed throughout China
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气候和土地利用变化对产水量的影响：中国分布的典型流域的异同
DOI：
10.1016/j.ejrh.2022.101294
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发表时间：
2023-02
期刊：
影响因子：
--
通讯作者：
Xin Wang
中科院分区：
文献类型：
--
作者：
Qian Guo;Chunxue Yu;Zhihao Xu;Ying Yang;Xin Wang
研究区域分布在中国各地的17个流域重点研究气候和土地利用变化对流域产水量的重大影响。由于流域地理、气候和社会经济特征的不同，产水量对气候和土地利用变化的响应也不同。流域特征对产水量响应的影响尚不清楚。本研究利用INVITE模型对分布在中国全境的17个特征迥异的典型流域的产水量进行了同步评估，并进行了具体情景模拟，比较了不同流域产水量对气候和土地利用变化响应的异同。气候变化对这些流域产水量的影响是相似的。然而，产水量对土地利用变化的响应表现出明显的空间差异，这种差异受流域地理和气候特征的影响。在调查流域中，北京、天津两个特大城市的海河流域年平均产水量最低，仅为中国东南部闽江流域的0.14%。这意味着，区域社会经济发展和水资源可获得性的不匹配仍然是中国面临的一大挑战，需要合理的跨流域管理战略。
Study regionSeventeen watersheds distributed throughout ChinaStudy focusClimate and land-use changes result in significant impacts on watershed water yields. The water yield response to climate and land-use changes differs due to variations in watershed geographical, climatic, and socioeconomic characteristics. Effects of watershed characteristics on water yield response remain unclear. In this study, the InVEST model is used to simultaneously assess water yields of 17 typical watersheds distributed throughout China, with widely differing characteristics, and specific scenario simulations are conducted to compare similarities and differences among different watersheds in the water yield response to climate and land-use changes.New hydrological insights for the regionResults show that about three quarters of the investigated watersheds are characterized by increasing water yields from 1990 to 2020. The impact of climate change on water yield is similar in these watersheds. However, water yield response to land-use changes exhibits significant spatial differences, which is affected by watershed geographical and climatic characteristics. The mean annual water yield of Hai River watershed with two megacities (Beijing and Tianjin) is lowest among investigated watersheds, which is only 0.14 % of that in the Min River watershed in southeastern China. This implies that the mismatch of regional socioeconomic development and water availability remains a big challenge in China and requires rational cross-watershed management strategies.
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