期刊
HYDROLOGY AND EARTH SYSTEM SCIENCES
卷 21, 期 9, 页码 4629-4648出版社
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/hess-21-4629-2017
关键词
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资金
- Ca' Foscari University of Venice
- Italy's Ministry for Environment, Land and Sea
Land surface models are excellent tools for studying how climate change and land use affect surface hydrology. However, in order to assess the impacts of Earth processes on river flows, simulated changes in runoff need to be routed through the landscape. In this technical note, we describe the integration of the Ecosystem Demography (ED2) model with a hydrological routing scheme. The purpose of the study was to create a tool capable of incorporating to hydrological predictions the terrestrial ecosystem responses to climate, carbon dioxide, and land-use change, as simulated with terrestrial biosphere models. The resulting ED2 + R model calculates the lateral routing of surface and subsurface runoff resulting from the terrestrial biosphere models' vertical water balance in order to determine spatiotemporal patterns of river flows within the simulated region. We evaluated the ED2 + R model in the Tapajos, a 476 674 km(2) river basin in the southeastern Amazon, Brazil. The results showed that the integration of ED2 with the lateral routing scheme results in an adequate representation (Nash-Sutcliffe efficiency up to 0.76, Kling-Gupta efficiency up to 0.86, Pearson's R up to 0.88, and volume ratio up to 1.06) of daily to decadal river flow dynamics in the Tapajos. These results are a consistent step forward with respect to the no river representation common among terrestrial biosphere models, such as the initial version of ED2.
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