Hydrology of Water Yield Prediction: Methodology for Watershed Low-Flow Prediction

摘要

Methodology was developed for prediction of low flow for small watersheds. Ten years of precipitation data were collected, adjusted, and analyzed for Deer Creek, Flynn Creek, and Needle Branch, Oregon. There was no really significant correlation between seasonal low-flow quantity and precipitation quantities for any previous period of time. A probability graph, based upon related previous discharge records, proved capable of predicting low-flow watershed yields normally within a 10% error. High-elevation reservoir systems for water storage can be utilized to retain 25 to 100% of annual water yield for later release, producing virtually uniform streamflow. (WRSIC abstract)