NDLI: The Modification of Numerical Evapotranspiration Model by Using Remotely Sensed Surface Temperature Data

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The Modification of Numerical Evapotranspiration Model by Using Remotely Sensed Surface Temperature Data

Content Provider	Semantic Scholar
Author	Saptomo, Satyanto Krido Nakano, Yoshisuke Haraguchi, Tomokazu Yuge, Kozue Kuroda, Masaharu
Copyright Year	2003
Abstract	ET for large area with different land covers were estimated by evaluating energy balance components for each land use, using numerical model of energy balance which includes differential equations of wind velocity, specific air humidity, potential air temperature, soil temperature and soil moisture. Remotely observed surface temperatures were used to modify the parameters used within the model. The inputs for this model are direct and diffused solar radiation, solar elevation, long wave radiation, surface temperature, ground moisture, crop transpiration resistance, leaf area index, crop canopy architecture, wind velocity, air temperature and relative humidity at surface and at boundary height. The extinction of solar radiation intensity as it passes the land cover canopy is estimated by treating the plant canopy as a single ‘big leaf’. As for the upper boundary of this system, constant values of wind velocity, potential air temperature, and specific humidity were used at the height of 100 m above ground surface. The lower boundary was taken at 0.5 m depth under ground surface. This technique is applied for conducting numerical experiment to estimate ET temporal and spatial distribution over different land uses at the area of Cidanau watershed, Banten, Indonesia. Land utilizations at the study location are artificial surface, paddy field, bare soil and forest. In this study, evapotranspiration estimated in artificial surface, bare soil, paddy field and forest are 0, 4.5, 5 and 6 mm/day respectively.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.kimberly.uidaho.edu/water/montpellier/p12/Saptomo_P.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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