Understanding the impact of dam‐triggered land use/land cover change on the modification of extreme precipitation

摘要: [1] Two specific questions are addressed in this study regarding dams (artificial reservoirs). (1) Can a dam reservoir) and the land use/land cover (LULC) changes triggered by it physically alter extreme precipitation? The term precipitation (EP) is used as way of representing model-derived upper bound that pertains to engineering definition standard probable maximum (PMP) design dams. (2) Among commonly experienced LULC due dams, which type change leads most detectable alteration American River Basin (ARW) Folsom were selected region. Four scenarios (comprising also various reservoir surface areas) analyzed step fashion elucidate scenario leading significant impact on EP. Regional Atmospheric Modeling System (RAMS, version 6.0) was analyze these two modes. In first mode (called normal), pattern each identified. second moisture-maximized), PMP represented from 100% relative humidity profile generated an indicator (EP). For particular case ARW dam, irrigation found having EP (a 5% increase 72 h total for normal 3% moisture-maximized mode) around watershed. Doubling size, other hand, brought only small Our RAMS-simulated results demonstrate driven surrounding landscape resulting can, fact, local regional hydrometeorology well precipitation. There strong possibility positive feedback mechanism initiated irrigated landscapes located upwind orographic rain producing watersheds impounded large