wo_nfs_gstc/WO_OSC_VIC_FlowMetrics (MapServer)

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Service Description: Flow metrics for the contiguous U.S., for the historical (1977-2006), mid-century (2030-2059), and end-of-century (2070-2099) time periods. Flow metrics are calculated for NHD (national hydrography dataset) streams based on gridded flow metric data described here: https://gdo-dcp.ucllnl.org/downscaled_cmip_projections/dcpInterface.html#About (Hydrology tab). Flow metrics include:- MA: Mean annual flow is calculated as the mean of the yearly cumulative discharge values. [Cubic feet per second]- MJan, MFeb, MMar, MApr, MMay, MJun, MJul, MAug, MSep, MOct, MNov, MDec: mean flow for each month. [Cubic feet per second]- HiQ1_5: The 1.5 year flood is calculated by first finding the annual maximum series of 7-day flows (i.e., the highest 7-day flow each year). The 33rd percentile of the annual maximum series defines the flow which occurs every 1.5 years, on average. [Cubic feet per second]- HiQ10 and HiQ25: the 10 and 25-year floods, respectively. [Cubic feet per second]- HiMax: Maximum flood level over 100 years. [Cubic feet per second]- Lo7Q1: average lowest 7-day flow during the year, calculated using either Jan-Dec or June-May, whichever has a lower standard deviation in the date of the low-flow week. [Cubic feet per second]- Lo7Q10: average lowest 7-day flow during the decade (calculated as the 10th percentile of the annual minimum weekly flows [Ann7DMin]). [Cubic feet per second]- BFI: The baseflow index is the ratio of the average daily flow during the lowest 7-day flow of the year to the average daily flow during the year overall. [Ratio]- CFM: Center of flow mass/center of timing is calculated using a weighted mean: CFM=(flow1*1+flow2*2+.flow365*365)/(flow1+flow2+.flow365), where flow is the flow volume on day pp of the water year. [Calendar date]- Lo7Q1Dt: Average date of center of lowest 7-day flow, calculated using either Jan-Dec or June-May, whichever has a lower standard deviation in the date of the low-flow week. [Calendar date]- W95: The number of daily flows between December 1 and March 31 which exceed the 95th percentile of daily flows across the entire year. [Count]

Map Name: WO_OSC_VIC_FlowMetrics

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Flow Metrics (0)

Description: Flow metrics for the contiguous U.S., for the historical (1977-2006), mid-century (2030-2059), and end-of-century (2070-2099) time periods. Flow metrics are calculated for NHD (national hydrography dataset) streams based on gridded flow metric data described here: https://gdo-dcp.ucllnl.org/downscaled_cmip_projections/dcpInterface.html#About (Hydrology tab). Flow metrics include:- MA: Mean annual flow is calculated as the mean of the yearly cumulative discharge values. [Cubic feet per second]- MJan, MFeb, MMar, MApr, MMay, MJun, MJul, MAug, MSep, MOct, MNov, MDec: mean flow for each month. [Cubic feet per second]- HiQ1_5: The 1.5 year flood is calculated by first finding the annual maximum series of 7-day flows (i.e., the highest 7-day flow each year). The 33rd percentile of the annual maximum series defines the flow which occurs every 1.5 years, on average. [Cubic feet per second]- HiQ10 and HiQ25: the 10 and 25-year floods, respectively. [Cubic feet per second]- HiMax: Maximum flood level over 100 years. [Cubic feet per second]- Lo7Q1: average lowest 7-day flow during the year, calculated using either Jan-Dec or June-May, whichever has a lower standard deviation in the date of the low-flow week. [Cubic feet per second]- Lo7Q10: average lowest 7-day flow during the decade (calculated as the 10th percentile of the annual minimum weekly flows [Ann7DMin]). [Cubic feet per second]- BFI: The baseflow index is the ratio of the average daily flow during the lowest 7-day flow of the year to the average daily flow during the year overall. [Ratio]- CFM: Center of flow mass/center of timing is calculated using a weighted mean: CFM=(flow1*1+flow2*2+.flow365*365)/(flow1+flow2+.flow365), where flow is the flow volume on day pp of the water year. [Calendar date]- Lo7Q1Dt: Average date of center of lowest 7-day flow, calculated using either Jan-Dec or June-May, whichever has a lower standard deviation in the date of the low-flow week. [Calendar date]- W95: The number of daily flows between December 1 and March 31 which exceed the 95th percentile of daily flows across the entire year. [Count]

Copyright Text: The USDA Forest Service makes no warranty, expressed or implied, including the warranties of merchantability and fitness for a particular purpose, nor assumes any legal liability or responsibility for the accuracy, reliability, completeness or utility of these geospatial data, or for the improper or incorrect use of these geospatial data. These geospatial data and related maps or graphics are not legal documents and are not intended to be used as such. The data and maps may not be used to determine title, ownership, legal descriptions or boundaries, legal jurisdiction, or restrictions that may be in place on either public or private land. Natural hazards may or may not be depicted on the data and maps, and land users should exercise due caution. The data are dynamic and may change over time. The user is responsible to verify the limitations of the geospatial data and to use the data accordingly.

Spatial Reference: 102003 (102003)

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