Linking Watershed Scales through Altered Waterways

作     者：Mason Johnson Katherine Clancy Mason Johnson;Katherine Clancy

作者机构：College of Natural Resources University of Wisconsin at Stevens Point Stevens Point USA 

出 版 物：《Journal of Water Resource and Protection》 (水资源与保护（英文）)

年 卷 期：2016年第8卷第10期

页      面：885-904页

学科分类：08[工学] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

主　　题：Nested Hierarchy Theory Altered Waterways Landuse Water Quality 

摘      要：Nested hierarchy theory advances the idea that rivers have a fractal dimension where processes at the catchment scale (1 km) control processes at the reach or mesoscale (100 m) and microscale (1 - 10 m). Largely absent from this work is a mesoscale link to the larger and smaller scales. We used stream alteration classifications to provide this link. We used orthophotographs, land cover, and LiDAR derived terrain models to classify stream alterations within four watersheds. We compared phosphorus point data with watershed, sub-watershed, and 100-meter buffers around the point data. In the predominately urban watershed, the 100 m buffer scale correlated better with phosphorus levels. In the predominately agricultural watershed, the sub-watershed scale correlated with phosphorus levels better. We found adding the classification of the stream alteration type clarified anomalously low phosphorus levels.