Summary
VSIM is a simple water balance model embedded in an Excel spreadsheet that
simulates the daily and seasonal water balance for a vineyard (block) given
data on weather, soils, and leaf area. VSIM takes advantage of publicly
available weather and evatranspiration data from the California Irrigation
Management Information System (CIMIS). The user can manipulate climate, ... leaf
area, soil water, and cover crop to examine effects on soil moisture, vine
water stress, and corresponding irrigation need. Daily water gains
(precipitation, irrigation) and losses (evapotranspiration, runoff) are used to
calculate a daily water balance. The current release of the model should be
considered a "beta" (test) version, both in format and substance. During
2005-06, VSIM is being further developed and validated under the California
Dept. Water Resources' Water Use Efficiency Program. The user should have a
working knowledge of Microsoft Excel 1998 or later.

http://geo.arc.nasa.gov/sge/vintage/vsim.html

Multimedia Sample

View full image Caption Description:  VSIM Flow Model

Service Citation

Title: VSIM - Water Balance Model Release_Date: 2003-05-01 Provider: AMES, NASA URL: http://geo.arc.nasa.gov/sge/vintage/vsim.html

Service Keywords

MODELS >COMPONENT PROCESS MODELS MODELS >HYDROLOGIC AND TERRESTRIAL WATER CYCLE MODELS

Science Keywords

TERRESTRIAL HYDROSPHERE >SURFACE WATER TERRESTRIAL HYDROSPHERE >SURFACE WATER >DISCHARGE/FLOW TERRESTRIAL HYDROSPHERE >SURFACE WATER >DRAINAGE TERRESTRIAL HYDROSPHERE >SURFACE WATER >FLOODS TERRESTRIAL HYDROSPHERE >SURFACE WATER >RIVERS/STREAMS TERRESTRIAL HYDROSPHERE >SURFACE WATER >RUNOFF TERRESTRIAL HYDROSPHERE >SURFACE WATER >WATER YIELD AGRICULTURE >SOILS LAND SURFACE >SOILS

ISO Topic Category

FARMING GEOSCIENTIFIC INFORMATION INLAND WATERS

Platform

MODELS

Service Provider

NASA/ARC/ESD/SGE > Ecosystem Science and Technology Branch, Earth Sciences Division, Ames Research Center, NASA Service Organization URL: http://geo.arc.nasa.gov/sge/ Service Provider Personnel Name: DON V. SULLIVAN Email: Donald.V.Sullivan at nasa.gov Contact Address: NASA Ames Research Center City: Moffett Field Province or State: CA Postal Code: 94035-1000 Country: USA

Personnel

LEE F. JOHNSON Role: TECHNICAL CONTACT Phone: 650-604-3331 Fax: 650-604-4680 Email: ljohnson at mail.arc.nasa.gov Contact Address: CSU Monterey Bay, Earth Systems Science & Policy MS242-4 NASA Ames Research Center City: Moffett Field Province or State: CA Postal Code: 94035-1000 Country: USA TYLER B. STEVENS Role: SERF AUTHOR Phone: (301) 614-6898 Fax: 301-614-5268 Email: Tyler.B.Stevens at nasa.gov Contact Address: NASA Goddard Space Flight Center Global Change Master Directory City: Greenbelt Province or State: MD Postal Code: 20771 Country: USA

Related URL

Link: VIEW RELATED INFORMATION Description: VINTAGE (Viticultural Integration of NASA Technologies for Assessment of the Grapevine Environment) Link: GET SERVICE Description: The Water Balance Model embedded in an Excel spreadsheet.

Creation and Review Dates

SERF Creation Date: 2005-12-22 SERF Last Revision Date: 2007-05-24

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