桦南县位于黑龙江省东北部，属完达山西麓余脉，三江平原第五区，面积 ４ ４１２平方公里，地形东高西低，是个半山区农业县。耕地 １８６万亩。河流均属松花江支流倭肯河水系，１０公里以上河流有１１条，分布均匀。特殊的丘陵漫岗山区的地貌类型和人为的生产活动，致使水土流 Huanan County is located in the northeastern part of Heilongjiang Province, belonging to the western margin of Wandashan, the fifth district of Sanjiang Plain, with an area of ​​4,412 square kilometers. The terrain is high in the east and low in the west and is a mid-mountain agricultural county. 186 acres of arable land. Rivers are tributaries of the Songhua River Woken River, 10 km above the river has 11, evenly distributed. Man-made landform types and man-made production activities in the special hills and hills have resulted in soil erosion