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Effects of land use and climate variability on the main stream of the Songhua River Basin, Northeast China

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posted on 2020-05-13, 16:29 authored by Muhammad Abrar Faiz, Dong Liu, Qiang Fu, Faisal Baig, Ahmad Niaz, Tianxiao Li

In this study, three representative concentration pathways (RCPs) and 15 general circulation models of the Coupled Model Intercomparison Project Phase 5 were used to assess the behaviour of precipitation (P) and surface air temperature (SAT) over part of the Songhua River Basin. The Water Evaluation and Planning (WEAP) model linked with SAT and P was used for monthly simulation of streamflow to assess the influence of land use/land cover and climate change on the streamflow. The results suggest that, under RCP2.6, RCP4.5 and RCP8.5, the SAT over the study area may increase in the 21st century by 1.12, 2.44 and 5.82°C, respectively. Moreover, by the middle of the 21st century, streamflow in the basin may have decreased by 19%. The decrease in streamflow may be due to changed land use conditions and water withdrawal, having critical implications for management and future planning of water resources in the basin.

Funding

This study is supported by the National Natural Science Foundation of China [No.51579044, No.41071053]; National Science Fund for Distinguished Young Scholars [No.51825901] and National Key R&D Program of China [No.2017YFC0406002]; Natural Science Foundation of Heilongjiang Province [No.E2017007].

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