Process - Based Stream - Riparian Modeling System to Assess Stream
نویسنده
چکیده
This paper describes a comprehensive stream-riparian modeling system to evaluate the effects of channel-riparian zones on stream Total Maximum Daily Loads (TMDLs). Nonpoint source pollutants emanating from agricultural fields are major contributors to the ecological impairment of stream channels. Nutrients and sediments are the principle sources of surface water impairment. The edge-of-field system or riparian zone and stream corridor play an important role in the management of sediments and processing of contaminants. A particular challenge we face today is the lack of integrated, comprehensive modeling tools to evaluate Best Management Practices designed to meet proposed TMDL levels for agricultural watersheds. Scientists at the U.S. Department of Agriculture-Agricultural Research Service-National Sedimentation Laboratory (USDA-ARS-NSL) are integrating the ARS Riparian Ecosystem Management Model (REMM) and the CONservational Channel Evolution and Pollutant Transport System model (CONCEPTS). ARS operates field sites in Mississippi and Georgia to study the effects of riparian vegetation on streambank stability and pollutant transport. CONCEPTS has been validated using long-term morphological data from the Goodwin Creek in North-Central Mississippi. The hydrology, soil erosion, and nutrient transport components of REMM have been validated against data obtained at the Gibbs Farm near Tifton, Georgia.
منابع مشابه
Stream water age distributions controlled by storage dynamics and nonlinear hydrologic connectivity: Modeling with high‐resolution isotope data
To assess the influence of storage dynamics and nonlinearities in hydrological connectivity on time-variant stream water ages, we used a new long-term record of daily isotope measurements in precipitation and streamflow to calibrate and test a parsimonious tracer-aided runoff model. This can track tracers and the ages of water fluxes through and between conceptual stores in steeper hillslopes, ...
متن کاملWhat are the effects of wooded riparian zones on stream temperature?
Background: Predicted increases in stream temperature due to climate change will have a number of direct and indirect impacts on stream biota. A potential intervention for mitigating stream temperature rise is the use of wooded riparian zones to increase shade and reduce direct warming through solar radiation. To assess the effectiveness of this intervention, we conducted a systematic review of...
متن کاملUsing Stream Classification to Prioritize Riparian Rehabilitation after Extreme Events
2 Extension Range Specialist and Research Scientist, University of Nevada, Department of Range Wildlife and Forestry, Reno, Nevada. Abstract: Historic use of many stream riparian areas and associated watersheds has impaired the capacity of riparian vegetation and floodplains to reduce stream energy and trap sediments. As low-gradient streams with erodible banks increase in width and change thei...
متن کاملMature and old-growth riparian forests: structure, dynamics, and effects on Adirondack stream habitats.
Riparian forests regulate linkages between terrestrial and aquatic ecosystems, yet relationships among riparian forest development, stand structure, and stream habitats are poorly understood in many temperate deciduous forest systems. Our research has (1) described structural attributes associated with old-growth riparian forests and (2) assessed linkages between these characteristics and in-st...
متن کاملStream temperature response to three riparian vegetation scenarios by use of a distributed temperature validated model.
Elevated in-stream temperature has led to a surge in the occurrence of parasitic intrusion proliferative kidney disease and has resulted in fish kills throughout Switzerland's waterways. Data from distributed temperature sensing (DTS) in-stream measurements for three cloud-free days in August 2007 over a 1260 m stretch of the Boiron de Merges River in southwest Switzerland were used to calibrat...
متن کامل