TY - GEN
T1 - Modeling Package for Assessing the Potential Effects of Hydrologic Change on Stream form and Integrity
AU - Bledsoe, Brian
AU - Anderson, Russ
AU - McCaig, Brian
AU - Flores, Alejandro
AU - Watson, Chester
PY - 2001
Y1 - 2001
N2 - Existing models can be used to assess the potential hydrologic effects of land-use change, but practical tools for translating these results into predictions regarding channel stability and effects on stream biota are currently unavailable to local planners. To improve watershed management in the context of changing land uses, we are developing a flexible, changeable package of small mechanistic models, statistical models, and expert scientific judgment to provide estimates of long-term changes in stream erosion potential, channel morphology, and instream disturbance regime. We are focusing primarily on the development of a Visual Basic / Excel package of stream / land-use management modules that are designed to operate with either continuous or single-event hydrologic input. Based on input channel geometry and flow series, the various modules provide users with estimates of the following characteristics for pre- and post-land use change conditions: (1) the temporal distribution of shear stress, specific stream power, and potential mobility of various particle sizes; (2) potential changes in channel cross sections as a result of altered flow and sedimentation regimes; (3) frequency, depth, and duration of scour; (4) effective discharge / sediment yield; (5) sediment transport capacity based on selected transport equations; and (6) analytical computation of stable channel dimensions. An attractive feature of this approach for stormwater management is a set of user-friendly tools to examine time-integrated sediment transport and scour characteristics across a range of flows and time periods associated with varying stormwater mitigation schemes. Ultimately, these modules will give end users a suite of tools to compare the erosive potential of hydrographs, to depict channel changes that might result from different land-use management scenarios, and to improve interpretation of biomonitoring information through consistent quantification of stream disturbance regimes.
AB - Existing models can be used to assess the potential hydrologic effects of land-use change, but practical tools for translating these results into predictions regarding channel stability and effects on stream biota are currently unavailable to local planners. To improve watershed management in the context of changing land uses, we are developing a flexible, changeable package of small mechanistic models, statistical models, and expert scientific judgment to provide estimates of long-term changes in stream erosion potential, channel morphology, and instream disturbance regime. We are focusing primarily on the development of a Visual Basic / Excel package of stream / land-use management modules that are designed to operate with either continuous or single-event hydrologic input. Based on input channel geometry and flow series, the various modules provide users with estimates of the following characteristics for pre- and post-land use change conditions: (1) the temporal distribution of shear stress, specific stream power, and potential mobility of various particle sizes; (2) potential changes in channel cross sections as a result of altered flow and sedimentation regimes; (3) frequency, depth, and duration of scour; (4) effective discharge / sediment yield; (5) sediment transport capacity based on selected transport equations; and (6) analytical computation of stable channel dimensions. An attractive feature of this approach for stormwater management is a set of user-friendly tools to examine time-integrated sediment transport and scour characteristics across a range of flows and time periods associated with varying stormwater mitigation schemes. Ultimately, these modules will give end users a suite of tools to compare the erosive potential of hydrographs, to depict channel changes that might result from different land-use management scenarios, and to improve interpretation of biomonitoring information through consistent quantification of stream disturbance regimes.
UR - http://www.scopus.com/inward/record.url?scp=1642349445&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:1642349445
SN - 0784405816
SN - 9780784405819
T3 - Proceedings of the 2001 Wetlands Engineering and River Restoration Conference
SP - 1287
EP - 1298
BT - Proceedings of the 2001 Wetlands Engineering and River Restoration Conference
A2 - Hayes, D.F.
A2 - Hayes, D.F.
T2 - Proceedings of the 2001 Wetlands Engineering and River Restoration Conference
Y2 - 27 August 2001 through 31 August 2001
ER -
