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RISImproved Box Model for Simulating Pesticide Transport in the Vadose Zone with Dispersive Flux through the Boundary Layer
Publisher: American Society of Civil Engineers
Abstract: A box-type transport model can be a useful tool for screening-level, long-term predictions of contamination and the relevant environmental assessment, especially when data are scarce and quick decisions are needed. In most ...
Delineation of Pothole-Dominated Wetlands and Modeling of Their Threshold Behaviors
Publisher: American Society of Civil Engineers
Abstract: Time-invariant contributing area and full hydrologic connectivity are commonly assumed in traditional watershed delineation and modeling. In reality, however, contributing area of a depression-dominated prairie basin varies ...
Modeling Metal and Sediment Transport in a Stream-Wetland System
Publisher: American Society of Civil Engineers
Abstract: It has been a challenge to couple a stream channel system with adjacent wetlands and to simulate their interactions and the dynamic processes associated with water flow, sediment movement, and contaminant transport. In ...
Effects of DEM Resolution on Surface Depression Properties and Hydrologic Connectivity
Publisher: American Society of Civil Engineers
Abstract: Surface digital elevation model (DEM) resolution receives increasing attention because of its importance in topographic analysis (e.g., quantification of surface depressions) and hydrologic modeling. Varied and even contrary ...
Event and Continuous Hydrologic Modeling with HEC-HMS
Publisher: American Society of Civil Engineers
Abstract: Event hydrologic modeling reveals how a basin responds to an individual rainfall event (e.g., quantity of surface runoff, peak, timing of the peak, detention). In contrast, continuous hydrologic modeling synthesizes ...
Improved Compartmental Modeling and Application to Three-Phase Contaminant Transport in Unsaturated Porous Media
Publisher: American Society of Civil Engineers
Abstract: The compartmental modeling approach has been widely used for simulating contaminant transport in porous media and surface waters. Yet a commonly used compartmental model that has only first-order accuracy may introduce ...
New Standardized Base Flow Index for Identification of Hydrologic Drought in the Red River of the North Basin
Publisher: ASCE
Abstract: There is an increasing interest in finding effective alternatives for groundwater drought indices due to the scarcity of groundwater data. The objective of this research is to improve hydrologic drought identification by ...
Multicriteria Evaluation Approach for Assessing Parametric Uncertainty during Extreme Peak and Low Flow Conditions over Snow Glaciated and Inland Catchments
Publisher: American Society of Civil Engineers
Abstract: This paper examines model uncertainties associated with streamflow by characterizing it into extreme high (peak) flows and low flows in two different catchments, viz. a snowmelt-induced hilly catchment (Satluj) and an ...
Sensitivity Analysis for an Infiltration-Runoff Model with Parameter Uncertainty
Publisher: American Society of Civil Engineers
Abstract: Evaluation of the uncertainty effect of input parameters on model outputs is presented. HYDROL-INF, an infiltration-runoff model for layered soils, is used for simulating infiltration and surface runoff. The predictive ...
Preliminary Study on the Effects of Surface Microtopography on Tracer Transport in a Coupled Overland and Unsaturated Flow System
Publisher: American Society of Civil Engineers
Abstract: Surface microtopography influences both spatial and temporal distributions of a series of hydrologic processes including infiltration, surface runoff, and unsaturated flow. Importantly, surface roughness and depressions ...