In:
Science and Technology Development Journal - Science of The Earth & Environment, Viet Nam National University Ho Chi Minh City, ( 2023)
Kurzfassung:
Full dyke system has greatly benefited farmers in cultivating triple rice cropping during flooding seasons in the Mekong Delta. Although tripple rice cropping brings benefits, its full dyke system has changed flooding situation in the Mekong Delta and stopped sediments to enrich the rice fields. Long-term intensive rice cultivation leads to soil degradation, which is one of the causes of reduced rice yields and productivity. The study aims to evaluate the changes in triple rice yield and productivity under the effect of a flood control dyke system in An Giang province. Spatial data on flooding and land use derived from MODIS satellite imagery was analyzed and compared with data of flood extension from Radar satellite product, while land use data from MODIS was verified with cultivation rice data from Statistical Yearbooks issued by An Giang province from 2000 - 2020. The result of this study shows that the flooded area decreased by 65.92%, creating conditions for farmers to expand the triple rice cropping area by 46,61%. However, the area of triple rice cropping in the phase of 2011 - 2020 has reduced 13,90%. As a result, the production decreased by 9,82% in the proportion of rice in the whole year and a 0,83 ton/ha decreased in comparison with the period when the dyke system was still under construction (2000-2011). In addition, triple rice cropping was practised in the protected flood control dyke systems in the upstream districts has higher average yields than those in the downstream districts (5.60 tons/ha compared to 5.40 tons/ha). The research shows a positive correlation between the increase in the area of flood control dyke system and the yield and production of triple rice cropping. The research results provide insights for researchers and policymakers in the region to adapt appropriate plans to minimize flood risks and ensure livelihood stability for farmers in the flood control dyke system in the upstream area, e.g. An Giang province, of the Mekong delta.
Materialart:
Online-Ressource
ISSN:
2588-1078
DOI:
10.32508/stdjsee.v7i2.749
Sprache:
Unbekannt
Verlag:
Viet Nam National University Ho Chi Minh City
Publikationsdatum:
2023
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