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首页> 外文会议>Sustainable irrigation and drainage V : Management, technologies and policies >Rain harvesting and stream storage for supplementary irrigation to rain-fed paddy schemes: a case study of Selapon Paddy Scheme
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Rain harvesting and stream storage for supplementary irrigation to rain-fed paddy schemes: a case study of Selapon Paddy Scheme

机译：集雨和蓄水以补充雨水稻田计划的灌溉：以塞拉彭稻田计划为例

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摘要

Brunei Darussalam is a fairly hilly country in the equatorial Borneo Island of Asia; it is green and rugged, having hot and humid weather with valleys and meadows suitable for paddy cultivation. The country enjoys moderate seasonal rainfall roughly in the months of September to December, ideal for rain-fed paddy cultivation. A crash program of "Grow More Food" has been undertaken presently to achieve food security by 2020. The Selapon Paddy Scheme (SPS) is a rain-fed paddy project in the district of Temburong in Brunei. Although mere is a perennial stream, named Sg. Apoi, flowing adjacent to the scheme area, it suffers from lack of water during a drought situation in between two rainfall events. Heavy flash flow generated in the hilly catchment flows down the stream untapped and gets lost in the sea while a nearby paddy scheme suffers from lack of irrigation water. This scenario needs to be reversed to make the best use of rainwater stream flow, a scarce resource, by harvesting and on-stream storage. SPS has great potential to be converted into a fully irrigated paddy project by providing supplementary irrigation. This paper focuses on a study of the SPS at pre-feasibility level, and investigates the possibility of harvesting the flash flow for the abstraction and diversion for supplementary irrigation by gravity or pump, or a combination of both. Findings suggest that a pump station could be the best alternative of water abstraction from the stream and intermittent storage in a service reservoir wherefrom irrigation mains and drainage network would provide supplementary irrigation to the field by gravity. If the drought situation worsens, a stand-by option would be kept for sub-irrigation by controlled drainage using the irrigation and drainage network for channel retention and structural control of ground water table in the scheme area. This option will save the crop development from wilting during periods of extreme drought.
机译：文莱达鲁萨兰国是亚洲赤道婆罗洲岛上一个比较丘陵的国家。它是绿色且崎，不平的，天气炎热潮湿，山谷和草甸适合水稻种植。大约在9月至12月，该国的季节性降雨适中，非常适合雨养稻田。目前已经实施了“增加粮食”的速成方案，以在2020年实现粮食安全。Selapon Paddy Scheme（SPS）是文莱的Temburong区的雨养稻田项目。尽管光是常年生的溪流，但名叫Sg。 Apoi在计划区附近流动，在两次降雨事件之间的干旱情况下，缺水。丘陵集水区产生的大量闪蒸水顺着未开采的水流向下流，并在海中流失，而附近的稻田计划则缺乏灌溉水。需要逆转这种情况，以通过收集和在流存储来最佳利用雨水流（一种稀有资源）。通过提供补充灌溉，SPS具有巨大的潜力，可以转变为完全灌溉的水稻项目。本文着重于在预可行性水平上对SPS的研究，并研究了通过重力或泵或两者结合来收集溢流进行抽象和转移的可能性。研究结果表明，泵站可能是从河水和服务性水库中的间歇性储水中提取水的最佳替代方案，从那里的灌溉主管和排水网络将通过重力为田间提供补充灌溉。如果干旱情况恶化，将保留备用方案，通过控制性排水来进行次灌溉，使用灌溉和排水网络来保持渠系和计划区域地下水位的结构。此选项将避免极端干旱期间作物的枯萎。

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