PROJECT SUMMARY:

Verification of DWR LAM Data

Multiple Water Agencies

DCSE created a project plan and a corresponding approach to evaluate the consistency of the data between the Department of Water Resources (DWR) and respective water districts.

Verification DWR LAM Data Image Cluster 1

This consulting service was provided to address discrepancies and prepare adjustment and variance requests data and reports to assist water districts responses to the DWR’s LAM project. Adjustment requests evaluate items such as the area of interest (AOI) boundary, disputed parcels, vacant parcels, new developments, MISC land use codes and other mis-coded parcels. The objective is to review the potable water service area and parcel boundaries and ensure the LAM data provided by DWR covers the correct boundary and parcels for the district.

As an example of this service, DCSE identified and verified new development areas through comparisons drawn from 2018-2019 NAIP imagery. Variance adjustment requests address eligible areas excluded from DWR LAM data, such as residential agriculture, horse corrals, parkway strips, easement/parcel shifts, and water bodies. The purpose here was to ensure correct allocation of the irrigable area and land cover classification within the district service area. To address parkway strips specifically, DCSE employed a parkway extraction model to address the problem where significant residential irrigable areas are being ignored in water budget calculations.

Verification DWR LAM Data Image Cluster 2

DCSE delivered the results of this work in shapefile and excel format at the parcel level. The data and reports generated by DCSE for the respective water districts were filed with DWR so that their water budgets could be evaluated and adjusted accordingly.

HIGHLIGHTS

Generate reports for discrepancies in DWR data identified by DCSE

BENEFITS

Project plan uses freely available NAIP imagery
Results help water agencies to adjust and increase their water budgets

PROJECT OWNER

Multiple Water Agencies

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