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Effect of historical changes in land use and climate on the water budget of an urbanizing watershed

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dc.contributor.author Claessens, Luc
dc.contributor.author Hopkinson, Charles S.
dc.contributor.author Rastetter, Edward B.
dc.contributor.author Vallino, Joseph J.
dc.date.accessioned 2006-04-13T20:54:41Z
dc.date.available 2006-04-13T20:54:41Z
dc.date.issued 2006-03-25
dc.identifier.uri http://hdl.handle.net/1912/873
dc.description Author Posting. © American Geophysical Union, 2006. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Water Resources Research 42 (2006): W03426, doi:10.1029/2005WR004131. en
dc.description.abstract We assessed the effects of historical (1931-1998) changes in both land-use and climate on the water budget of a rapidly urbanizing watershed, Ipswich River basin (IRB), in northeastern Massachusetts. Water diversions and extremely low flow during summer are major issues in the IRB. Our study centers on a detailed analysis of diversions and a combined empirical/modeling treatment of evapotranspiration (ET) response to changes in climate and land-use. A detailed accounting of diversions showed that net diversions increased due to increases in water withdrawals (primarily ground water pumping) and export of sewage. Net diversions constitute a major component of runoff (20% of streamflow). Using a combination of empirical analysis and physically based modeling we related an increase in precipitation (2.7 mm/yr) and changes in other climate variables to an increase in ET (1.7 mm/yr). Simulations with a physically based water-balance model showed that the increase in ET could be attributed entirely to a change in climate, while the effect of land-use change was negligible. The land-use change effect was different from ET and runoff trends commonly associated with urbanization. We generalized these and other findings to predict future streamflow using climate change scenarios. Our study could serve as a framework for studying suburban watersheds, being the first study of a suburban watershed that addresses long-term effects of changes in both land-use and climate, and accounts for diversions and other unique aspects of suburban hydrology. en
dc.description.sponsorship This research was partially supported by NSF grants (DEB-9726862, OCE-9726921 and OCE-0423565). en
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher American Geophysical Union
dc.relation.uri http://dx.doi.org/10.1029/2005WR004131
dc.subject Water budgets en
dc.subject Evapotranspiration en
dc.subject Climate change en
dc.subject Land-use change en
dc.subject Urbanization en
dc.subject Water-balance model en
dc.subject Ipswich River en
dc.title Effect of historical changes in land use and climate on the water budget of an urbanizing watershed en
dc.type Article en
dc.identifier.doi 10.1029/2005WR004131


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