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Title: Global pattern for the effect of climate and land cover on water yield

Author: Zhou, Guoy; Wei, Xiaohua; Chen, Xiuzhi; Zhou, Ping; Liu, Xiaodong; Xiao, Yin; Sun, Ge; Scott, David F.; Zhou, Shuyidan; Hano, Liusheng; Su, Yongxian;

Date: 2015

Source: Nature Communications

Publication Series: Scientific Journal (JRNL)

Description: Research results on the effects of land cover change on water resources vary greatly and the topic remains controversial. Here we use published data worldwide to examine the validity of Fuh’s equation, which relates annual water yield (R) to a wetness index (precipitation/ potential evapotranspiration; P/PET) and watershed characteristics (m). We identify two critical values at P/PET¼1 and m¼2. m plays a more important role than P/PET when mo2, and a lesser role when m42. When P/PETo1, the relative water yield (R/P) is more responsive to changes in m than it is when P/PET41, suggesting that any land cover changes in non-humid regions (P/PETo1) or in watersheds of low water retention capacity (mo2) can lead to greater hydrological responses. m significantly correlates with forest coverage, watershed slope and watershed area. This global pattern has far-reaching significance in studying and managing hydrological responses to land cover and climate changes.

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Zhou,Guoy; Wei, Xiaohua; Chen, Xiuzhi; Zhou, Ping; Liu, Xiaodong; Xiao, Yin; Sun, Ge; Scott, David F.; Zhou, Shuyidan; Hano, Liusheng; Su, Yongxian 2015. Global pattern for the effect of climate and land cover on water yield. Nature Communications 9 p. Macmillan Publishers Limited

 


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