Page 19 - Beaumont Basin Watermaster
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BEAUMONT BASIN WATERMASTER
MEMORANDUM NO. 19-18
Date: August 7, 2019
From: Thomas Harder, Thomas Harder and Associates
Subject: Return Flow Accounting Methodology - Draft Report
Recommendation: That the Board reviews the Draft Report and provides comments
The purpose of this Technical Memorandum is to present the results of the Return Flow
Accounting Methodology draft report for consideration by the Board.
In October 2018, the Beaumont Basin Watermaster Board directed the ALDA Team to
develop a methodology to estimate return flow from applied water within each
Appropriator’s respective service areas within the Beaumont Basin adjudicated boundary.
A draft report has been prepared summarizing the results of the investigation (See
attached). A formal presentation will be given at the regularly scheduled Board meeting;
the presentation will include:
• An accounting methodology for water delivered to customers in the Beaumont
Basin adjudicated area.
• Assumptions as to how much water delivered to customers is applied for outdoor
use.
• Assumptions as to how much of the water applied to outdoor use becomes return
flow.
• Methodology for addressing parcels within Appropriator service areas that overlap
and extend across the Beaumont Basin adjudication boundary.
• A methodology to account for the return flow lag time between the time of
application at the surface and the arrival of the return flow at the groundwater.
• Estimates of return flow, by Appropriator, for 2017 using the updated methodology.
Beaumont Basin Watermaster - August 7, 2019 - Page 19 of 38
