AGTEHM: documentation of modifications to the terrestrial ecosystem hydrology model (TEHM) for agricultural applications. Environmental Sciences Division Publication No. 1770
Technical Report
·
OSTI ID:5248094
AGTEHM, an agricultural application version of TEHM, the Terrestrial Ecosystem Hydrology Model, is the outgrowth of over a decade of effort to realize a model of the complex interrelations of air, water, land, and vegetation. TEHM combines mechanistic algorithms for climatic and hydrologic processes with vegetation properties to explicityly simulate interception, throughfall, infiltration, root zone evaporation, transpiration, drainage, plant and soil water potential, unsaturated and saturated subsurface flow, surface runoff, and open channel flow. AGTEHM was developed from TEHM and several innovations have been added for agricultural applications. These include changrs in the input data options, algorithms for sprinkler and flood irrigation, an alternative surface resistance-water potential relationship, a variable-contributing-area function, and the coupling of a model for soil macropore effects on water flow. Several internal changes to the original code have been made to increase calculation efficiency. This report is intended as a companion to the TEHM report and describes those features not previously documented.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5248094
- Report Number(s):
- ORNL/TM-7856; ON: DE82015857
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
520100* -- Environment
Aquatic-- Basic Studies-- (-1989)
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
553000 -- Agriculture & Food Technology
60 APPLIED LIFE SCIENCES
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
A CODES
AGRICULTURE
ALGORITHMS
CLIMATES
COMPUTER CODES
ECOSYSTEMS
FLUID FLOW
HYDROLOGY
INDUSTRY
IRRIGATION
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
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Aquatic-- Basic Studies-- (-1989)
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
553000 -- Agriculture & Food Technology
60 APPLIED LIFE SCIENCES
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
A CODES
AGRICULTURE
ALGORITHMS
CLIMATES
COMPUTER CODES
ECOSYSTEMS
FLUID FLOW
HYDROLOGY
INDUSTRY
IRRIGATION
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
MODIFICATIONS
PLANTS
TERRESTRIAL ECOSYSTEMS