メコンデルタ洪水常襲稲作地域におけるフルダイク化の進展とその影響 [in Japanese] Expansion of Full-dyke System and Its Impact in Flood-prone Rice Area in the Mekong Delta [in Japanese]
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The Mekong Delta is considered one of the mega-delta that faces great risk by climate change. This paper investigated the impact on hydrological environment caused by full-dyke system that is developed for triple rice cropping in flood prone area in the Mekong Delta in Vietnam. The effects, issues and impact of full-dyke system to surrounding hydrological environment were analyzed based on the survey to the farmers, satellite imagery and water level of the main-distributaries of Mekong River. An Giang Province, adjacent to Cambodian border, was selected from flood-prone rice area in the Mekong Delta. The following changes have been clarified due to the expansion of full-dyke systems 1) Soil fertility has been decreased due to less sediment supply from flood, increasing occurrence of disease and pest due to year-round rice culture by triple cropping and deterioration of water quality of the canal, 2) Water level at Can Tho station of Hau River which is south-downstream of An Giang Province tends to rising in recent years, 3) The prolonged trend of the flood duration was observed in Cambodia which is upstream of An Giang and in Kien Gian Province which is west-downstream of An Giang.
- Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering
Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 81(3), 271-278, 2013
The Japanese Society of Irrigation, Drainage and Rural Engineering