稻田养鱼的生态防灾机制与效益分析——以湖南为例
Journal of Institute of Disaster-Prevention Science and Technology(2009)
Abstract
以湖南为例从分散蓄水与扩容蓄水、即时蓄水与重复蓄水、分级截流与设阻截流等角度,分析了稻田养鱼的生态防灾机制,得出湖南宜鱼稻田87.0万hm2,以蓄水30 cm计算可蓄存107.9亿m3。通过重复蓄水、设阻蓄水,接纳多次降雨洪水,调节水分时空分布,创造减灾避灾的人工生态防灾系统,形成多物种共生共存的农田湿地生态系统,提高农田生态经济效益。
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Key words
water store up,rice paddy pisciculture,ecological disaster prevention mechanism,ecological and economic benefits
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