Expanded shifted ratings and estimated provisional streamflow for streamgages in the James River Basin in Virginia, water years 1991 through 2013

Estimated provisional streamflow values (Messinger and Burgholzer, 2017) for streamgages in James River Basin and the shifted, expanded ratings that were used to develop them are included in this dataset. This file contains source data, daily streamflow records and selected ratings that had been saved in the National Water Information Service database for water years 1991-2013. Microsoft Excel formulas that were used to compute the estimated provisional streamflow (AltFlow) tables are included, and may be used to extend the AltFlow record following the procedure described by Messinger and Burgholzer (2017), in Appendix 2. This release also contains the existing AltFlow record for the same streamgages in comma-separated variable (csv) format.

本数据集包含詹姆斯河流域（James River Basin）各水文测站的估算暂定径流量（provisional streamflow）数值（数据引自Messinger与Burgholzer，2017），以及用于生成该类数值的经平移与扩展的水位流量关系曲线（ratings）。本文件收录1991至2013水文年期间，存储于国家水文信息服务（National Water Information Service）数据库中的源数据、逐日径流量记录与经遴选的水位流量关系曲线。数据集还附带了用于计算上述估算暂定径流量对应AltFlow表格的Microsoft Excel公式，用户可参照Messinger与Burgholzer（2017）附录2所述流程，利用该类公式扩展AltFlow数据集。本次发布还提供了对应相同水文测站的现有AltFlow数据集，格式为逗号分隔值（Comma-Separated Values，CSV）。