Geospatial Fabric Attribute Tables for PRMS gw_flow (Preliminary)

Summary

NOT FOR PUBLIC CONSUMPTION These data are part of ongoing research to compare the efficacy of three different methods for estimating the gwflow_coef parameter for PRMS ('original', 'Bjerklie', and 'HaySep' methods are explained below). This parameter is being estimated for HRUs in the contributing area above each of a set of reference stream gages ('refGages', taken from the GagesII data seteach refGage) in Geospatial Fabric regions 01-18. Gages are associated with stream segments, as are HRUs. There are 1480 files based on the "keepthesame.txt" list attached below. Gages with no HRUs: There are 10 gages ('02084557', '02110500', '02236500', '03588500', '07351500', '09406300', '09512200', '10143500', '10172200', '16720300') which [...]

Summary

NOT FOR PUBLIC CONSUMPTION

These data are part of ongoing research to compare the efficacy of three different methods for estimating the gwflow_coef parameter for PRMS ('original', 'Bjerklie', and 'HaySep' methods are explained below). This parameter is being estimated for HRUs in the contributing area above each of a set of reference stream gages ('refGages', taken from the GagesII data seteach refGage) in Geospatial Fabric regions 01-18. Gages are associated with stream segments, as are HRUs. There are 1480 files based on the "keepthesame.txt" list attached below.

Gages with no HRUs: There are 10 gages ('02084557', '02110500', '02236500', '03588500', '07351500', '09406300', '09512200', '10143500', '10172200', '16720300') which are associated with segments but have no associated HRUs within the Geospatial Fabric (and therefore no parameter values or files in this study). This typically indicates that a gage has been associated with a minor segment out of a divergence in the flow network, probably erroneously. Even if an HRU is adjacent to more than one segment, all of its runoff is routed to (only) the dominant segment. Two of these gages, ('09512200', '16720300'), were not being expected in this analysis but are part of the Geospatial Fabric.

gwflow_coef_Bjerklie2, uses a regression against the gwflow_coef_HaySep values to derive values for all segments and HRUs. A minimum value of 0.001 is enforced. This floor value impacts 286 HRUs nationally. 28 of these HRUs were within contributing areas above reference gages, in regions 10U and 17. There are 11 HRUs with gwflow_coef_Bjerklie == NULL, in regions 13 and 17, but none are within contributing areas above reference gages.

[not posted] gwflow_coef_orig values reflect the standard Geospatial Fabric methodology for deriving this parameter, which scales the statistical distribution of geologic probability per region to the acceptable (module-specified) range of gwflow_coef values. Each HRU has a potentially unique value.

[not posted] gwflow_coef_HaySep values were derived by applying the HySep and other algorithms for each refGage's observed streamflow record (using baseflow as the gwflow_coef value). All HRUs contributing to a given refGage are given the value for that gage. Values appear to be missing values for 1395 gages nationally. This was reduced to 325 gages based on a separate CSV file. This equates to 3290 HRUs with no gwflow_coef values. We're still working through this apparent loss of information. The set of gwflow_coef_HaySep parameter files reflect the 325 gages == NULL (which translates to 3633 HRUs with no values). The list of good gages ('goodGages.txt') is attached below.

_[this isn't posted yet]_ The geodatabase contains, among other things, the featureclass nhru_refGages which includes 4 attribute fields relevant for this study: gwflow_coef_orig (based on the standard GF parameterization), gwflow_coef_HaySep (based on hydrograph separation of observed gage record), and gwflow_coef_Bjerklie and gwflow_coef_Bjerklie2 (which are based on regression fit to gwflow_coef_HaySep values; gwflow_coef_Bjerklie2 = max(0.001, gwflow_coef_Bjerklie)).

Attached Files

sorting

Metadata First

Recent First

Alphabetical

Click on title to download individual files attached to this item.

keepthesame.txt “Kirsti's list of expected gages (including ones w/no inflows; not used)”	13.02 KB	text/plain; charset=ISO-8859-1
gagesNoInflowingHRUs-dropped.txt “These 8 gages are associated w/streams having no inflowing HRUs”	78 Bytes	text/plain; charset=windows-1252
gagesWithData.txt “Actual list of 1472 gage ids for which Bjerklie and HaySep parameters exist.”	14.39 KB	text/plain; charset=windows-1252
Lumen_gwflow_coef_Bjerklie.zip “1472 parameter files for corresponding gages.”	607.79 KB	application/zip

Geospatial Fabric Attribute Tables for PRMS gw_flow (Preliminary)

Summary

Summary

Attached Files

sorting

Metadata First

Recent First

Alphabetical

Communities

Provenance

Item Actions

View Item as ...

Save Item as ...

View Item...

Summary

Summary

Attached Files sorting Metadata First Recent First Alphabetical

Communities

Provenance

Item Actions

View Item as ...

Save Item as ...

View Item...

Attached Files

sorting

Metadata First

Recent First

Alphabetical