一、概况 研究区位于东经114°—115°,北纬27°40′—28°00′。罗霄山脉北端之武功山中段袁水流域。地形北高南低,西高东低,属低山丘陵区。气候湿润多雨,属中亚热带季风型气候,年降雨量1600毫米左右,年蒸发量1366毫米左右。 区内地表水系发育,袁水东西向横贯全区最大流量2480米_3/秒,最小流量4.16米_3/秒,其支流伸入到各山间谷地,形成密集的树枝状水文网。 在构造上位于北东向萍(乡)—乐(平)坳陷带之西段,武功山隆起区之北,地质构造复 I. Overview The study area is located at longitude 114 ° -115 ° east and latitude 27 ° 40’-28 ° 00 ’north. Luoxiao mountain north of the Wugongshan Yuan water basin. North and South low topography, west and east low, is a hilly area. Humid and humid climate, is a subtropical monsoon climate, annual rainfall of about 1600 mm, annual evaporation of about 1366 mm. The development of surface water system in the area, Yuanshui east-west across the region’s maximum flow of 2480 m _3 / s, the minimum flow of 4.16 m _3 / s, its tributaries into the valleys to form a dense dendritic hydrological network. It is located at the north of the Wudonggou uplift in the west section of the north-east Xiangping (Xiang) -Le (Ping) Depression and is characterized by complex geological structures