Comparison of PMP-Driven Probable Maximum Floods with Flood Magnitudes due to Increasingly Urbanized Catchment: The Case of American River Watershed

Earth Interactions

WondmagegnYigzaw¹ 

关键词: Dams;    Land use and land cover;    Urbanization;    Imperviousness;    Probable maximum precipitation;    Probable maximum flood;   

DOI  :  10.1175/2012EI000497.1

学科分类：地球科学(综合)

来源: American Geophysical Union

【 摘 要 】

AbstractSince historical (predam) data are traditionally the sole criterion for dam design, future (postdam) meteorological and hydrological variability due to land-use and land-cover change cannot be considered for assessing design robustness. For example, postdam urbanization within a basin leads to definite and immediate increase in direct runoff and reservoir peak inflow. On the other hand, urbanization can strategically (i.e., gradually) alter the mesoscale circulation patterns leading to more extreme rainfall rates. Thus, there are two key pathways (immediate or strategic) by which the design flood magnitude can be compromised. The main objective of the study is to compare the relative contribution to increase in flood magnitudes through direct effects of land-cover change (urbanization and less infiltration) with gradual climate-based effects of land-cover change (modification in mesoscale storm systems). The comparison is cast in the form of a sensitivity study that looks into the response to the ...

【 授权许可】

Unknown