Modeling the combined impact of future climate and land use changes on streamflow of Xinjiang Basin, China

Modeling the combined impact of future climate and land use changes on streamflow of Xinjiang Basin, China
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模拟未来气候和土地利用变化对中国新疆盆地径流的综合影响

DOI:
10.2166/nh.2015.206
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发表时间:
2016-04
期刊:
影响因子:
2.7
通讯作者:
Qi Lingyan
Qi Lingyan
中科院分区:
环境科学与生态学4区
文献类型:
--
作者:
Yan Renhua;Huang Jiacong;Wang Yan;Gao Junfeng;Qi Lingyan

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水文循环对气候和土地利用变化的响应是研究水生态系统历史、现状和未来演变的重要内容。利用耦合模式比对项目第五期多模式集成和栅格化新安江模式,模拟了新疆盆地未来3种气候变化情景和2种土地利用/覆盖变化条件下的径流量,研究了未来气候和土地利用/覆盖变化对径流量的综合影响。模拟结果表明,未来气候和土地利用/覆盖变化不仅影响径流的季节分布,而且还影响径流的年总量。对于每种气候情景,21世纪秋季和初冬的平均月流量增加4%以上,而春季和夏季减少-26%以上。年径流量呈-27%的明显下降趋势。与土地利用/覆被变化相比,气候变化对径流变化的影响更大。土地利用/覆被变化可以减轻1月至8月的气候变化影响,并在其他月份加强这种影响。研究结果可为今后区域水资源管理和土地利用规划提供科学依据。
The response of hydrologic circulation to climate and land use changes is important in studying the historical, present, and future evolution of aquatic ecosystems. In this study, the Coupled Model Inter-comparison Project Phase 5 multi-model ensemble and a raster-based Xin'anjiang model were applied to simulate future streamflows under three climate change scenarios and two land use/cover change conditions in the Xinjiang Basin, China, and to investigate the combined effect of future climate and land use/cover changes on streamflow. Simulation results indicated that future climate and land use/cover changes affect not only the seasonal distributions of streamflow, but also the annual amounts of streamflow. For each climate scenario, the average monthly streamflows increase by more than 4% in autumn and early winter, while decreasing by more than −26% in spring and summer for the 21st century. The annual streamflows present a clear decreasing trend of −27%. Compared with land use/cover change, climate change affects streamflow change more. Land use/cover change can mitigate the climate change effect from January to August and enhance it in other months. These results can provide scientific information for regional water resources management and land use planning in the future.
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