Impacts of Land Cover Changes on Runoff and Sediment in the Cedar Creek Watershed, St. Joseph River, Indiana, United States Impacts of Land Cover Changes on Runoff and Sediment in the Cedar Creek Watershed, St. Joseph River, Indiana, United States

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Vol5 No.2: 113-121

TitleImpacts of land cover changes on runoff and sediment in the Cedar Creek Watershed, St. Joseph River, Indiana, United States 

AuthorJIANG Xiaobo1, HUANG Chi-hua2, RUAN Fushui3

Addresses1 Key Laboratory of Mountain Hazards and Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, Sichuan, China; 2 USDA ARS, National Soil Erosion Research Laboratory, 275 S Russell Street, West Lafayette, IN, 47907, USA; 3 Water and Soil Conservative Department, Fuzhou, 350003, Fujian, China

Corresponding authorjxb@imde.ac.cn,

CitationJIANG Xiaobo, HUANG Chi-hua, RUAN Fushui (2008) Impacts of land cover changes on runoff and sediment in the Cedar Creek Watershed, St. Joseph River, Indiana, United State. JOURNAL OF MOUNTAIN SCIENCE 5(2):113-121. DOI: 10.1007/s11629-008-0105-0

DOI10.1007/s11629-008-0105-0

AbstractThe relation between runoff and sediment and land cover is investigated in the Cedar Creek Watershed (CCW), located in Northeastern Indiana, United States. The major land cover types in this watershed are cultivated land, woodland and pasture /Conservation Reserve Program (CRP), which account for approximate 90 % of the total area in the region. Moreover, land use was changed tremendously from 2000 to 2004, even without regarding the effect of the crop rotation system (corn & soybean). At least 49 % of land cover types were changed into other types in this period. The land cover types, ranking by changing area from high to low series, are rye, soybean, corn, woodland and pasture/CRP. The CCW is divided into 21 subwatersheds, and soil and water loss in each sub-watershed is computed by using Soil and Water Assessment Tool (SWAT). The results indicate that the variations in runoff and sediment have positive relation to the area of crops (especially corn and soybean); sediment is more sensitive to land cover changes than runoff; more heavy rainfall does not always mean more runoff because the combination of different land cover types always modify runoff coefficient; and rye, soybean and corn are the key land cover types, which affected the variation in runoff and sediment in the CCW.

KeywordsCedar Creek Watershed; Soil and Water Assessment Tool; land cover change; runoff; sediment