[1] Stream hydrology strongly affects the structure of aquatic communities. Changes to air temperature and precipitation driven by increased greenhouse gas concentrations are shifting timing and volume of streamflows potentially affecting these communities. The variable infiltration capacity (VIC) macroscale hydrologic model has been employed at regional scales to describe and forecast hydrolog...

The hydrologic cycle results from the combination of energy conversions and atmospheric transport, and the laws of thermodynamics set limits to both. Here, we apply thermodynamics to derive the limits of the strength of hydrologic cycling within the Earth system and about the properties and processes that shape these limits. We set up simple models to derive analytical expressions of the limits...

[1] Two elementary issues in contemporary Earth system science and engineering are (1) the specification of model parameter values which characterize a system and (2) the estimation of state variables which express the system dynamic. This paper explores a novel sequential hydrologic data assimilation approach for estimating model parameters and state variables using particle filters (PFs). PFs...

Interactions between surface and groundwater systems are well-established theoretically and observationally. While numerical models that solve both surface and subsurface flow equations in a single framework (matrix) are increasingly being applied, computational limitations have restricted their use to local and regional studies. Regional or watershed-scale simulations have been effective tools...

39 S oil hydraulic parameters are essential input to most hydrologic and climatic models (Mohanty et al., 2002; Mohanty and Zhu, 2007). Th ey are used to defi ne the hydraulic characteristics of the soil vital in modeling soil moisture and fl ux in the unsaturated zone near the land–atmosphere boundary. At the scale of model applications, it is very important to defi ne the appropriate paramete...

Fuzzy sets theory has proven over the years to be a valuable tool for modeling uncertainty in engineering. It is used extensively in control, in expert systems and in rule-based models. However, applications to sensitivity analysis and regression are still few, mainly because there is no appropriate software available. A C++ library of objects has been developed to easily and efficiently introd...

Abstract Floods greatly impact human settlements in flood risk areas, such as floodplains and coastal lowlands, following heavy rainfall. The Alto Guadalentin valley, an orogenic tectonic depression, experiences extreme flash floods land subsidence due to groundwater withdrawal, rendering it one of Europe's fastest subsiding regions. In this study, we compared two 2D event models representing d...

Evaluation of the OntoSoft Ontology for Describing Metadata for Legacy 1 Hydrologic Modeling Software 2 Bakinam T. Essawy , Jonathan L. Goodall , Hao Xu, and Yolanda Gill 3 a Department of Civil and Environmental Engineering, University of Virginia, 351 McCormick 4 Road, PO Box 400742, Charlottesville, VA, 22908, USA 5 b Data Intensive Cyber Environment Center, University of North Carolina, Cha...

Enrique R. Vivoni (corresponding author) Department of Earth and Environmental Science, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA Tel: +1 505 835 5611 Fax: +1 505 835 5634 E-mail: [email protected] Kevin T. Richards East Bay Municipal Utility District, 375 11 Street, Oakland, CA 94607, USA Enhancements to traditional catchment-scale water quality assessments can be real...