연구보고서
- 저자
- 전종안 박사
- 작성일
- 2016.01.23
- 조회
- 212
- 요약
- 목차
Food security can be improved through increasing the areas of agricultural land or by implementing more intensive agricultural management, including irrigation practices. The objectives of this study were to incorporate practical irrigation schemes into the NASA Land Information System (LIS) and to use it to investigate the impacts of irrigation schemes on land surface states and fluxes, including evapotranspiration, soil moisture, and runoff, in the Murray-Darling basin, Australia, and in East Asia and the Korean Peninsula. For investigations this year, the Noah-LSM (Noah 3.2-Land Surface Model) in the LIS was selected, to incorporate three different irrigation schemes such as non-irrigation, flood irrigation, drip irrigation, and sprinkler irrigation schemes. These three irrigation schemes were applied in the Murray-Darling basin. However, drip irrigation and sprinkler irrigation schemes were not applied to East Asia and the Korean Peninsula regions, since these schemes are not commonly used in these areas. The Moderate Resolution Imaging Spectrometer (MODIS) vegetation index was used to estimate crop-growing seasons for application in a global experiment. The flood irrigation scheme increased the latent heat flux (QLE) and ground heat flux (QG), but decreased the sensible heat flux (QH). In regions with the flood irrigation scheme, evapotranspiration showed a tendency to increase over the growing season. The scheme also increased soil moisture in the first three soil layers (from the surface to 0.6 m deep), while there was no apparent tendency at the fourth soil layer (from 0.6 to 1.0 m deep). Although the impacts of the flood irrigation scheme on the land surface state and fluxes have not been evaluated against observed data in East Asia and the Korean Peninsula, results from the experiments demonstrated that the proposed irrigation scheme can be used to qualitatively investigate impacts on hydrology in these areas.