TY - JOUR
T1 - Using SWAT for sub-field identification of phosphorus critical source areas in a saturation excess runoff region
AU - Winchell, Michael F.
AU - Folle, Solomon
AU - Meals, Donald
AU - Moore, Julie
AU - Srinivasan, Raghavan
AU - Howe, Eric A.
N1 - Publisher Copyright:
© 2015 IAHS.
PY - 2015/5/4
Y1 - 2015/5/4
N2 - Abstract: The identification of phosphorus critical source areas (CSAs) is an important step in reducing nonpoint-source phosphorus contributions to lakes and streams, providing the basis for targeted mitigation and efficient utilization of limited resources. A high-resolution SWAT model, consisting of sub-field level hydrologic response units, was applied to Lake Champlain’s Missisquoi Bay Watershed, located along the United States–Canadian border. Because this region of the northeastern United States is dominated by saturation excess runoff, a novel approach for adjusting SCS (Soil Conservation Service) curve numbers based on the local compound topographic index was developed. After calibration and validation, the SWAT model was run for a 30-year period to identify the phosphorus CSAs throughout the watershed, determining that 20% of the watershed produces 74% of the total phosphorus load. The resulting sub-field level CSA map is currently being hosted online, providing a valuable tool for natural resources planners, land owners, and scientists. Editor Z.W. Kundzewicz; Guest editor V.
AB - Abstract: The identification of phosphorus critical source areas (CSAs) is an important step in reducing nonpoint-source phosphorus contributions to lakes and streams, providing the basis for targeted mitigation and efficient utilization of limited resources. A high-resolution SWAT model, consisting of sub-field level hydrologic response units, was applied to Lake Champlain’s Missisquoi Bay Watershed, located along the United States–Canadian border. Because this region of the northeastern United States is dominated by saturation excess runoff, a novel approach for adjusting SCS (Soil Conservation Service) curve numbers based on the local compound topographic index was developed. After calibration and validation, the SWAT model was run for a 30-year period to identify the phosphorus CSAs throughout the watershed, determining that 20% of the watershed produces 74% of the total phosphorus load. The resulting sub-field level CSA map is currently being hosted online, providing a valuable tool for natural resources planners, land owners, and scientists. Editor Z.W. Kundzewicz; Guest editor V.
KW - SWAT model
KW - critical source areas
KW - modelling
KW - phosphorus
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U2 - 10.1080/02626667.2014.980262
DO - 10.1080/02626667.2014.980262
M3 - Article
AN - SCOPUS:84929606084
SN - 0262-6667
VL - 60
SP - 844
EP - 862
JO - Hydrological Sciences Journal
JF - Hydrological Sciences Journal
IS - 5
ER -