POD! Water-Flows Dayflow_1956-200_Delta daily flow data

Dayflow is a computer program developed in 1978 as an accounting tool for determining historical Delta boundary hydrology. Dayflow output is used extensively in studies initiated by the Department of Water Resources (DWR), the Department of Fish and Game (DFG), and less frequently by other State and Federal agencies [e.g., U. S. Bureau of Reclamation (USBR)] and private consultants. The Dayflow program presently provides an estimate of historical mean daily flows: through the Delta Cross Channel and Georgiana Slough past Jersey Point past Chipps Island to San Francisco Bay (net Delta outflow) The degree of accuracy of Dayflow output is affected by the Dayflow computational scheme and the accuracy and limitations of the input data. The input data include the principal Delta stream inflows, Delta precipitation, Delta exports, and Delta gross channel depletions. These data include both monitored and estimated values as described in the Dayflow program documentation. An example of the limitations of Dayflow output can be seen by comparing estimated Net Delta Outflow (Net Delta Outflow Index [NDOI]) and measured Net Delta Outflow. Currently, flows are not routed to account for travel time through the Delta. All calculations involving inflows, depletions, transfers, exports, and outflow are performed using data for the same day. All Dayflow summary reports distributed through January 1985, providing flow data through August 1984, and data for September 1984 reported herein were generated according to the algorithm described in the Computational Scheme section.