南雄瀑布灌区渠道水资源损失及利用效率研究

Study on Water Loss and Utilization Efficiency of Canal in Nanxiong Waterfall Irrigation

此研究旨在分析南雄市瀑布灌区支渠渠道的用水效率、水损失和渠道密度之间的相关性。根据灌溉渠道位置分布,对该地区东干渠的5条支渠进行了有目的的采样。在选定的分段渠道中测量了渠道水的流入和流出量。考虑用水、蒸发和渗流后,确定渠道水的损失及利用效率。结果显示,该地区支渠的水量损失范围为1.2×10^(-4)~4.7×10^(-4)m^(3)/s,水量的利用效率约40%~90%,渠道密度为0.03~0.25 km/km^(2),研究发现,该地区水量利用效率、水损失和渠道密度之间呈负指数关系,此外,水损失还与渠道的宽度正相关。该地区部分渠道需要进行衬砌修缮,以降低水量损失。

The aim of this study is to analyze the correlation between water use efficiency,water loss,and channel density in the secondary channels of the Pubu irrigation area in Nanxiong City.Based on the distribution of irrigation channels,five branches of the east canal were purposively sampled in the region.The inflow and outflow of water in selected segments of the channels were measured.Affer considering water usage,evaporation,and seepage,the loss and utilization efficiency of channel water were determined.The results showed that the range of water loss in the branch channels in the region was 1.2x10^(-4)~4.7×10^(-4)m^(3)/s,with a water utilization efficiency of approximately 40%~90%,and a channel density of 0.03~0.25 km/km^(2).The study shows a negative exponential relationship between water utilization efficiency,water loss,and channel density in the region.In addition,water loss was positively correlated with the width of the channel.Some channels in the area need to be repaired to reduce water loss.