Modification of DWCM-AgWU Model Applied to a Paddy-dominant Basin with Large Dams
Modification of DWCM-AgWU Model Applied to a Paddy-dominant Basin with Large Dams
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DWCM-AgWU 模型的修正应用于大坝水稻为主的流域
DOI：
10.1002/ird.2013
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发表时间：
2017
影响因子：
1.9
通讯作者：
Ryoji Kudo
中科院分区：
文献类型：
--
作者：
Vongphet;Jutithep;Takao Masumoto;Hiroki Minakawa;Ryoji Kudo
对包含农业用水的分布式水循环模型（DWCM‐AgWU）进行了修正，并将修正后的模型应用于泰国湄南河流域2008-2011年旱涝期的水资源利用评估。引入了一个水库管理模式，将两座大型水坝（普密蓬和诗丽吉水坝）与几个偏远的灌溉区结合起来进行水资源分配/管理，并对洪峰进行了特殊处理，以考虑农业实践。在该系统中，两座大坝是旱季灌溉用水的主要来源，在雨季用于控制洪水。此外，对于湄南河下游从那空沙湾到大海的河流，在雨天采用了另一种特殊的水管理，以使湄南河引水大坝的放水量保持在或低于某一阈值。也就是说，当流量超过阈值时，水被引水到大湄南河灌溉工程东西两侧的主要灌渠。根据模拟结果，位于湄南河四条主要支流汇合处以下的那空沙湾站的日流量计算值与观测值之间的平均相对误差为21%。修改后的模型将能够连续计算减轻极端事件（如2011年泰国洪水）的影响，管理灌溉用水，并提出适应气候变化的对策。版权所有©2016 John Wiley & Sons， Ltd。
The Distributed Water Circulation Model incorporating Agricultural Water Use (DWCM‐AgWU) was modified and the revised model was applied to assess water use in the Chao Phraya River basin in Thailand for the years 2008–2011, during which there were droughts and floods. A reservoir management model was introduced to incorporate two large dams (Bhumibol and Sirikit dams), with several remote irrigated areas in water allocation/management, and performed special treatments of flood peaks to account for agricultural practices. In the system, the two dams are the main sources of irrigation water during the dry season and they are used to control floods during the rainy season. Moreover, for the lower Chao Phraya River from Nakhon Sawan to the sea, another special water management was applied on rainy days to keep the release at the Chao Phraya Diversion Dam at or below a certain threshold. That is, when discharge exceeded the threshold, water was diverted to main irrigation canals on the western and eastern sides of the Greater Chao Phraya Irrigation Project. According to the simulation, the average relative error between the calculated and observed daily discharge was 21% at the Nakhon Sawan station, which is located below the confluences of the four main tributaries of the Chao Phraya River. The modified model will enable continuous calculations for mitigating the impacts of extreme events, such as the 2011 flood in Thailand, managing the use of irrigation water, and proposing adaptive countermeasures to climate change. Copyright © 2016 John Wiley & Sons, Ltd.