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镇巴县大巴山西段米仓山山区,总土地面积为3437平方公里。境内山势雄伟,层峦叠幛,山高谷深,水流湍急,海拔1000至2000米。碳酸盐类在县内广为分布,形成许多奇特的岩溶景观,各类岩溶地形,如溶洞、溶沟、溶槽、暗河、盲谷、漏斗、溶蚀洼地、落水洞等甚为发育,有较丰富的岩溶水,它是镇巴县主要的地下水资源。全县溶洞岩溶水出露很多,经调查有344处总计常流量为14.7米3/秒,年径流量达4.6亿立方米,占全县地表径流量的18%。根据实测证明、河流最枯水期的流量,即是岩溶水补给量。
Zhenba County Daba Cangshan Mountain West, the total land area of 3437 square kilometers. The territory of majestic mountains, amidst overlapping layers, deep valleys, fast-flowing, 1000 to 2000 meters above sea level. Carbonates are widely distributed in the county and form many peculiar karst landscapes. Various karst topographies such as karst caves, ditches, troughs, underground rivers, blind valleys, funnels, dissolved depressions, Richer karst water, which is the main groundwater resources in Zhenba County. There are many karst water outcrops in the county. After the survey, there are 344 total normal flow rates of 14.7 m 3 / s and annual runoffs of 460 million m 3, accounting for 18% of the county’s surface runoff. According to the actual measurement, the flow of the river in the dry season is the recharge of karst water.