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引言图１ 渠道横断面及防渗结构图广西容县地处桂东南，属丘陵山区县份。面积２２５７．３９ｋｍ２，山地、丘陵面积１７２６．６０ｋｍ２，占全县总面积的７６．５７％，其余为台地、平地、水面，面积共５２８．７４ｋｍ２，占全县面积的２３．４３％。容县水利工程的灌溉干
Introduction Figure 1 channel cross-section and seepage control structure Guangxi Rongxian County is located in southeastern Guangxi, is a hilly mountain counties. With an area of 2257.39km2. The mountainous and hilly area is 1726.60km2, accounting for 76.57% of the total area of the county. The rest is terrace, flat ground and water surface with a total area of 528.74km2, accounting for 23.43% of the total area of the county. Irrigation in Rongxian County water conservancy project