20201224 09572300 1.0 TRUE 20231128 121102 150000000 5000 ItemDescription withheld <DIV STYLE="text-align:Left;"><DIV><P><SPAN>A zipped polygon shapefile that contains a field (text or number) that represents a unique indentifier for each subbasin.</SPAN></P></DIV></DIV> <DIV STYLE="text-align:Left;"><DIV><P><SPAN>The name of the field in the subbasins shapefile that contains unique identifiers for each subbasin.</SPAN></P></DIV></DIV> <DIV STYLE="text-align:Left;"><DIV><P><SPAN>A zipped polygon shapefile that includes information for interpreting % impervious (directly connect to outlet), initial moisture condition (component of DTHETA parameter), and surface storage (used in HEC-HMS).</SPAN></P></DIV></DIV> <DIV STYLE="text-align:Left;"><DIV><P><SPAN>A text field in the land-use shapefile that contains the assumed moisture condition for each land-use. Valid values areDry:"d", "dry", "D", "DRY"Field Capacity ("normal" moisture condition, moist):"m", "moist", "M", "MOIST"Saturated:"s", "sat", "S", "SAT"</SPAN></P></DIV></DIV> <DIV STYLE="text-align:Left;"><DIV><P><SPAN>The depth of surface storage, in inches, for each land-use area. Please refere to NDOT reference material for selection of appropriate values. In general, values should not exceed 0.35 inches except for agricultural areas which may reach 0.5 inches.</SPAN></P></DIV></DIV> <DIV STYLE="text-align:Left;"><DIV><P><SPAN>The percent, expressed as a decimal from 0 to 100, of impervious area for each land-use area which is directly connected to a basin outlet.</SPAN></P></DIV></DIV> <DIV STYLE="text-align:Left;"><DIV><P><SPAN>The percent, expressed as a decimal from 0 to 100, of vegetative cover for each land-use area. </SPAN></P><P><SPAN>This value is not to be used unless previously authorized by NDOT Project Management staff with consultation from the NDOT Hydraulics Division. </SPAN></P></DIV></DIV>

<DIV STYLE="text-align:Left;"><DIV><P><SPAN>This tool calculates Green and Ampt parameters for hydrologic subbasins for use in HEC-HMS based upon NDOT soils data and methodology. Land-use data is required to allow specification of surface (HMS) and soil moisture deficit (DTHETA) for each subbasin. Data is output into a comma-seperated file (CSV) with summary data for each subbasin.</SPAN></P></DIV></DIV>

Green and Ampt Per Subbasin Server <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This tool calculates Green and Ampt parameters for hydrologic subbasins for use in HEC-HMS based upon NDOT soils data and methodology. Land-use data is required to allow specification of surface (HMS) and soil moisture deficit (DTHETA) for each subbasin. Data is output into a comma-seperated file (CSV) with summary data for each subbasin.</SPAN></P></DIV></DIV></DIV> ndot hydrology green and ampt ArcToolbox Tool 20231003