Database of Geomorphic Features, Klamath River, California 2010

The USGS, in cooperation with the U.S. Fish and Wildlife Service and the National Fish and Wildlife Foundation, compiled a map of geomorphic features along a 140-km segment of the main stem Klamath River below Iron Gate Dam, CA. Flood disturbance within the study reach is produced by the combined effect of natural flows and reservoir releases. The physical response of the Klamath River to flood disturbance is strongly dependent upon sediment storage in bars and floodplains. The map provides a summary of channel and riparian features that was used to estimate sediment storage in bars and floodplains. Study results will be useful for interpreting linkages among physical and biological processes and for evaluating the effectiveness of flow management targeted to improve river conditions for endangered salmonid populations. The geomorphic map is contained within an ArcGIS geodatabase (v.10.6.1). The structure of the geodatabase and the methods used to delineate individual geomorphic features are described in a companion report.

美国地质调查局（USGS）联合美国鱼类及野生动物管理局（U.S. Fish and Wildlife Service）与国家鱼类及野生动物基金会（National Fish and Wildlife Foundation），针对加利福尼亚州铁门大坝下游140公里的克拉马斯河干流河段，编制了一份地貌特征分布图。本研究河段内的洪水扰动由自然径流与水库泄流共同作用引发。克拉马斯河对洪水扰动的物理响应，在很大程度上取决于沙洲与洪泛平原的沉积物储存量。该分布图汇总了河道与河岸带特征数据，用于估算沙洲及洪泛平原的沉积物储存量。本研究成果可用于阐释物理与生物过程间的关联机制，同时可为评估旨在改善濒危鲑科鱼类种群栖息河流生境的流量管理措施的有效性提供支撑。该地貌特征分布图存储于ArcGIS地理数据库（v.10.6.1）中。该地理数据库的结构，以及用于勾绘各类地貌特征的技术方法，已在配套研究报告中详细说明。