Urban Water Demand Regression Modeling for California Water Suppliers


An older version of this resource http://www.hydroshare.org/resource/e9137bf4054a45778a7944d3ebceea0f is available.
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Resource type: Model Program Resource
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Created: Jun 16, 2021 at 4:14 p.m.
Last updated: Jun 16, 2021 at 4:25 p.m.
DOI: 10.4211/hs.f70cefe684b746c6b37dd4ca056a6b34
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Abstract

Urban water demand modeling with regression identifies explanatory factors of water use in cities. A generalized demand modeling approach was developed for over 400 urban water supply agencies in California. Using standardized data from self-reported sources for agencies across the state, a batch-processing approach was used to create standardized urban water demand models. The models were developed to test the validity of a simplified and generalized demand modeling approach using monthly available data. Semilog, multivariate regression models were developed for each urban water supply agency. Consumption from residential (single- and multi-family), commercial, industrial, and institutional water use were considered as outcome variables. Explanatory variables include indicator variables for months in a calendar year, periods of water conservation requirements during a 2011-16 severe drought, population, and water rates. The models were of reasonable fit, with adjusted R-squared values ranging from 0.6-0.99. Visual inspection revealed that the monthly models captured trends with reasonable accuracy. The time frame for models was 2013-18, a period with standardized available data through statewide reporting. The modeling approach has been subsequently further extended to incorporate additional climate variables (precipitation and evapotranspiration) for sector-specific models. The models are intended to understand explanatory factors of demand through a generalized modeling approach and not intended to be used for water supply operations without further refinement and testing. The approach can be adapted to many types of cities.

Subject Keywords

Resource Level Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
California
Longitude
-120.2575°
Latitude
36.4426°

Temporal

Start Date:
End Date:

Content

Resource Specific

Software
Programming Language R
Operating System Windows 10
Release Date 01/19/2021
Version 1.0

References

Sources

Derived From: California State Water Resources Control Board: Electronic Annual Reports (partial)

Related Resources

This resource updates and replaces previous version: http://www.hydroshare.org/resource/e9137bf4054a45778a7944d3ebceea0f

How to Cite

Porse, E. (2021). Urban Water Demand Regression Modeling for California Water Suppliers, HydroShare, https://doi.org/10.4211/hs.f70cefe684b746c6b37dd4ca056a6b34

This resource is shared under the Creative Commons Attribution-NoCommercial CC BY-NC.

 http://creativecommons.org/licenses/by-nc/4.0/
CC-BY-NC

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