Rainfall Evaluation for the Paddy Cropping Schedule in Lower Myanmar

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作   者：

Maung Maung Naing;  SATOH Masayoshi;  FUJIKI Tomohisa; 

作者机构：

Doctoral Program in Agricultural Sciences;  Ibaraki;  305-8572;  JAPAN;  1-1-1 Ten-no dai;  Tsukuba;  University ofTsukuba; 

关键词：

栽培時期;  Rainy paddy;  Summer paddy;  乾期水稲作;  下ミャンマー;  Reservoir operation;  貯水池運用;  Inundation;  浸水;  雨期水稲作;  雨量解析;  Cropping schedule;  Rainfall analysis;  Lower Myanmar; 

期刊名称：

農業土木学会論文集

i s s n：

0387-2335

年卷期：

2003 年 71 卷 1 期

页   码：

99-105

页   码：

摘   要：

In the Ngamoeyeik Irrigation Project Area outside of Yangon City in Lower Myanmar, rainy season paddy cultivation has traditionally been performed from the seedling period in June to the harvesting in November under rain-fed conditions. Summer paddieswith irrigation from December to May were added after completion of the project in 1995. However, the project's rainy paddies often suffer from inundation of rain, and the irrigated summer paddies are constrained by limitations in the water-storage reservoirs. To improve this situation, we here propose the development of a paddy cropping schedule for the project, based on our analysis of the 76-year rainfall record at Yangon. The main results of our analysis are as follows: (1) the tendency of farmersto transplant their crops at the end of June, comes from the security of rain water supply, thus increasing the possibility of inundation damage; (2) by shifting the transplantation for the rainy paddies to the end of May, the plant height can be more than doubled, reducing the possibility of inundation damage; (3) such a one-month shift in the transplantation for rainy paddies can be made feasible, even from the viewpoint of water resources management, through proper reservoir operation.