著者・編者OKUDA, Yukio
ONISHI, Junya
OMORI, Keisuke
OYA, Tetsuji
FUKUO, Ayumi
KURVANTAEV, Rakhmon
SHIROKOVA, Yulia
NASONOV, Vladimir Georgirevich
タイトル（掲載誌）JIRCAS Working Report : Development of subsurface drainage and water-saving irrigation technology for mitigation of soil salinization in Uzbekistan
一般注記Agricultural productivity in Central Asia has increased with the development of irrigation. In some regions, continual agricultural land use without adequate maintenance of drainage systems, despite using abundant water in the fields, has led to an increase in groundwater levels and soil salinization rate. The salinization level can be changed by controlling the groundwater level. Important countermeasures practiced in Uzbekistan include lowering high groundwater levels through open drainage, subsurface drainage, and vertical drainage systems. Here, we report the current status and problems of these systems in the Syrdarya Region, Uzbekistan, which is afflicted with serious salinization issues as per field survey results and existing data. Our results clarify that the functioning of the drainage system should be monitored because (1) the bottoms of the open drainage are too undulated to allow smooth discharge, (2) some outlets of the subsurface drainage are under drainage water level or covered with soil, and (3) the current operation style of the vertical drainage is different from the conventional one. Thus, it is important to ascertain the effects of the discharge systems in Uzbekistan.
The above article was reprinted from “Journal of Arid Land Studies, Vol. 25, No. 3, pp. 81-84 (2015)” by courtesy of the Japanese Association for Arid Land Studies.
一次資料へのリンクURLjircas_working_report88-_1-7 （fulltext）
連携機関・データベース国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
提供元機関・データベース国際農林水産業研究センター : 国際農研機関リポジトリ