气候变化领域集成服务门户(CCPortal): Integrated assessment modeling reveals near-channel management as cost-effective to improve water quality in agricultural watersheds

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DOI	10.1073/pnas.2024912118
	Integrated assessment modeling reveals near-channel management as cost-effective to improve water quality in agricultural watersheds
	Hansen A.T.; Campbell T.; Cho S.J.; Czuba J.A.; Dalzell B.J.; Dolph C.L.; Hawthorne P.L.; Rabotyagov S.; Lang Z.; Kumarasamy K.; Belmont P.; Finlay J.C.; Foufoula-Georgiou E.; Gran K.B.; Kling C.L.; Wilcock P.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:28
英文摘要	Despite decades of policy that strives to reduce nutrient and sediment export from agricultural fields, surface water quality in intensively managed agricultural landscapes remains highly degraded. Recent analyses show that current conservation efforts are not sufficient to reverse widespread water degradation in Midwestern agricultural systems. Intensifying row crop agriculture and increasing climate pressure require a more integrated approach to water quality management that addresses diverse sources of nutrients and sediment and off-field mitigation actions. We used multiobjective optimization analysis and integrated three biophysical models to evaluate the cost-effectiveness of alternative portfolios of watershed management practices at achieving nitrate and suspended sediment reduction goals in an agricultural basin of the Upper Midwestern United States. Integrating watershed-scale models enabled the inclusion of near-channel management alongside more typical field management and thus directly the comparison of cost-effectiveness across portfolios. The optimization analysis revealed that fluvial wetlands (i.e., wide, slow-flowing, vegetated water bodies within the riverine corridor) are the single-most cost-effective management action to reduce both nitrate and sediment loads and will be essential for meeting moderate to aggressive water quality targets. Although highly cost-effective, wetland construction was costly compared to other practices, and it was not selected in portfolios at low investment levels. Wetland performance was sensitive to placement, emphasizing the importance of watershed scale planning to realize potential benefits of wetland restorations. We conclude that extensive interagency cooperation and coordination at a watershed scale is required to achieve substantial, economically viable improvements in water quality under intensive row crop agricultural production. © 2021 National Academy of Sciences. All rights reserved.
语种	英语
scopus关键词	nitrate; Article; controlled study; crop production; ecosystem restoration; environmental planning; multiobjective optimization; program cost effectiveness; water quality; watershed management; wetland
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238692
作者单位	St. Anthony Falls Laboratory, University of Minnesota, Minneapolis, MN 55455, United States; Civil, Environmental, and Architectural Engineering Department, University of Kansas, Lawrence, KS 66045, United States; Center for Agricultural and Rural Development, Iowa State University, Ames, IA 50011, United States; Hydrodynamic Branch, US Geological Survey, Reston, VA 20192, United States; Department of Biological Systems Engineering, Virginia Tech, Blacksburg, VA 24061, United States; Department of Soil, Water, and Climate, University of Minnesota, St. Paul, MN 55108, United States; Soil and Water Management Research Unit, US Department of Agriculture Agricultural Research Service, St. Paul, MN 55108, United States; Department of Ecology, Evolution, and Behavior, University of Minnesota, St. Paul, MN 55108, United States; Dyson School of Applied Economics and Management, Cornell University, Ithaca, NY 14853, United States; Institute on the Environment, University of Minnesota, St. Paul, MN 55108,...
推荐引用方式 GB/T 7714	Hansen A.T.,Campbell T.,Cho S.J.,et al. Integrated assessment modeling reveals near-channel management as cost-effective to improve water quality in agricultural watersheds[J],2021,118(28).
APA	Hansen A.T..,Campbell T..,Cho S.J..,Czuba J.A..,Dalzell B.J..,...&Wilcock P..(2021).Integrated assessment modeling reveals near-channel management as cost-effective to improve water quality in agricultural watersheds.Proceedings of the National Academy of Sciences of the United States of America,118(28).
MLA	Hansen A.T.,et al."Integrated assessment modeling reveals near-channel management as cost-effective to improve water quality in agricultural watersheds".Proceedings of the National Academy of Sciences of the United States of America 118.28(2021).