Abstract:
: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/PET=1 and m=2. m plays a more important role than P/PET when m<2, and a lesser role when m>2. When P/PET<1, the relative water yield (R/P) is more responsive to changes in m than it is when P/PET>1, suggesting that any land cover changes in non-humid regions (P/PET<1) or in watersheds of low water retention capacity (m<2) 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.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Zhou G,Wei X,Chen X,Zhou P,Liu X,Xiao Y,Sun G,Scott DF,Zhou S,Han L,Su Ydoi
10.1038/ncomms6918subject
Has Abstractpub_date
2015-01-09 00:00:00pages
5918issn
2041-1723pii
ncomms6918journal_volume
6pub_type
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