Abstract
This study assesses the impact of irrigation on terrestrial fluxes through incorporation of satellite-derived irrigation scheme and crop datasets into the NOAH Land Surface Model in Punjab. NOAH 3.3 LSM was run at 0.05-degree resolution for three years from 2013 to 2015.The results show that the evapotranspiration (ET) and latent heat flux (LE) have increased significantly in the Northwestern and Central Punjab region while soil temperature has reduced in the area. The increase in LE is by about 32% for the growing seasons, DJFM (December January February March)and ASON (August September October November), which is balanced by the increase in ET by 26%. The soil temperature also witnesses cooling by 0.6 degrees at most locations. Besides, successfully demonstrating the effects of irrigation, the present study can also be relevant to water and energy cycles studies of an area that still lacks proper quantification of agricultural practices utilizing irrigation.
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