Abstract
The ecological water requirement of grassland in the year 2009 in Ili river basin in growing season is calculated according to multi-source remote sensing data, including MODIS products (Land Surface Temperature, Leaf Area Index, and emissivity), Global Land Data Assimilation System (GLDAS)-wind speed, monthly mean air temperature, GLDAS-daily maximum and minimum air temperature, STRM-DEM and MERIS land cover product. Radiation estimation method in SEBS model, the FAO- recommended Penman-Monteith formula and single crop coefficient method are adopted to calculate net solar radiation, reference evapotranspiration and crop coefficient, respectively. The results show that ecological water requirement of grassland in April is the lowest, about 2.90mm/day, while that in July reached its peak value, about 4.66mm/day. Except the result in May, the ecological water requirement at east side is higher than other sides of the river basin. The analysis on obtained results reveals that multi-source remote sensing data can be effectively used instead of observed data to estimate ecological water requirement in arid and semi-arid region where meteorological and hydrological data are nearly ungauged.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
