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It uses meteorological data from the moment of the recording of the satellite data to solve the 'instantaneous' energy balance, and uses extrapolation to calculate daily evapotranspiration. Using a time series of satellite and meteorological data, periodic cumulative (e.g. weekly, monthly, yearly) evapotranspiration data can be calculated.
Given the limited data input to the equation, the calculated evapotranspiration should be regarded as only broadly accurate. Rather than a precise measure of evapotranspiration, the output of the equation is better thought of as providing an order of magnitude. [2] The inaccuracy of the equation is exacerbated by extreme variants of weather.
Potential evapotranspiration is expressed in terms of a depth of water or soil moisture percentage. If the actual evapotranspiration is considered the net result of atmospheric demand for moisture from a surface and the ability of the surface to supply moisture, then PET is a measure of the demand side (also called evaporative demand).
The Penman-Monteith equation approximates net evapotranspiration (ET) from meteorological data as a replacement for direct measurement of evapotranspiration. The equation is widely used, and was derived by the United Nations Food and Agriculture Organization for modeling reference evapotranspiration ET 0 .
There have been several documents known as the "California Water Plan", with the most recent being published in 2013. [65] Before the state of California started drafting comprehensive plans for the management of water in the state, the earliest plan for water distribution in California was an 1873 report.
California Uniform Fire Code: Hazardous Material Management Plans and Hazardous Material Inventory Statements - Office of the State Fire Marshal (CAL FIRE-OSFM) [2] The mission of the Unified Program is to protect public health and safety, to restore and enhance environmental quality, and to sustain economic vitality through effective and ...
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The California Water Plan (Water Plan) is the State of California’s long-term strategic plan for managing and developing water resources throughout the state. The Water Plan is mandated by California Water Code Sections 10004–10013, [ 1 ] and the California Department of Water Resources (DWR) is required to update the plan every five years ...