Abstract
Improving irrigation monitoring and efficiency is a current priority of the Government of Vietnam, focusing primarily on the agricultural sector which consumes most of the available surface and groundwater. This paper presents how remote sensing can be used in an integrated manner to achieve better understanding of key eco-hydrological processes including precipitation, evapotran-spiration, irrigation and crop growth. The results indicated that Normalized Difference Vegetation Index derived from Moderate Resolution Imaging Spectroradiometer (MODIS) can be applied to determine irrigated pixels on a spatial and temporal basis. The validation using measured water level showed a Pearson correlation of 0.7 proving the high accuracy of this method. The inclusion of these technologies is deemed necessary to improve water resources monitoring and management and hence, ensure long-term drought resilience and water and food security. Ca River Basin in the central Vietnam was selected as a case study to test this approach.
Highlights
The results indicated that Normalized Difference Vegetation Index derived from Moderate Resolution Imaging Spectroradiometer (MODIS) can be applied to determine irrigated pixels on a spatial and temporal basis
Vegetation indices calculated from spectral reflectance provided information on crop growth, water deficit and drought (Hu et al, 2020; Nanzad et al, 2019). These data are especially valuable for policy makers in data scarce areas, as they can be linked to land-use, hydrology and all other water related issues within a river basin
This study presents a comprehensive overview of water resources and irrigated area mapping in the Ca river basin using remote sensing
Summary
Vegetation indices calculated from spectral reflectance provided information on crop growth, water deficit and drought (Hu et al, 2020; Nanzad et al, 2019). These data are especially valuable for policy makers in data scarce areas, as they can be linked to land-use, hydrology and all other water related issues within a river basin. This information is vital to achieve sustainable land management practices
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