水草对灌区渠道输水能力的影响

在江西省赣抚平原灌区选择典型渠道，通过对清除水草前后渠道流速、流量和糙率的对比观测，分析水草对灌区渠道输水能力和水质的影响。结果表明，实施机械除草后，渠道的流速和流量均大幅度增加，糙率大幅下降，渠道输水能力明显提高，同时主要水质指标得到明显改善。

The Impact of Plants on Water Supply Capacity of Irrigation Canals

Abstract: The typical channels in GANFU PLAIN irrigation area in Jiangxi province selected, through to comparative the flow velocity, flow rate and roughness of the channels before and after removing weeds, analysis of the effects on channel capacity and water quality in irrigation area by water. The results show that, after the implementation of mechanical weeding ,the flow velocity and flow rate of channel were increased substantially, and roughness was decreased substantially, the channel capacity was improved significantly, while the main water quality indexes were improved obviously.