气候变化领域集成服务门户

We describe a framework called Regional Hydrologic Modeling for Environmental Evaluation (RHyME(2)) for hydrologic modeling across scales. Rooted from hierarchy theory, RHyME(2) acknowledges the rate-based hierarchical structure of hydrological systems. Operationally, hierarchical constraints are accounted for and explicitly described in models put together into RHyME(2). We illustrate RHyME(2)with a two-module model to quantify annual nutrient loads in stream networks and watersheds at regional and subregional levels. High values of R-2 (> 0.95) and the Nash-Sutcliffe model efficiency coefficient (> 0.85) and a systematic connection between the two modules show that the hierarchy theory-based RHyME(2) framework can be used effectively for developing and connecting hydrologic models to analyze the dynamics of hydrologic systems.