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一、概况松花湖水源林,系指吉林省永吉、蛟河、桦甸县和吉林市郊区沿湖四周生长的次生林。总面积23万公顷,有林地面积19万公顷。其中天然林17.8万公顷,人工林1.6万公顷。柞木林最多占55％,山杨,白桦林占25％,水曲柳、胡桃楸林占11％,人工落叶松林占9％。林令30～40年,多萌生起源,每公顷平均蓄积量60～70M~3,总蓄积量1300万M~3。年总生长量38万M~3,年平均每公顷生长量不足2M~3。松花湖位于吉林省中部,东经126°41′,北纬42°58′。湖水面积550平方公里,总蓄水量108亿M~3,水源来自长白山天池,由第二松花江、辉发河、拉法河、金沙河等主要支流
I. Overview Songhua Lake source forest, refers to the Jilin Province Yongji, Jiaohe, Huadian County and Jilin suburbs along the lake around the growth of secondary forests. The total area of 230,000 hectares, an area of 190,000 hectares of forest land. Among them, there are 178,000 hectares of natural forests and 16,000 hectares of plantations. Oak accounted for up to 55%, aspen, birch accounted for 25%, Ash, walnut trees accounted for 11%, artificial larch forest accounted for 9%. Lin order 30 to 40 years, more adventitious origin, the average volume per hectare 60 ~ 70M ~ 3, the total volume of 13 million M ~ 3. The total annual growth of 380000 M ~ 3, the annual average growth of less than 2M ~ 3. Songhua Lake is located in the central Jilin Province, east longitude 126 ° 41 ’, latitude 42 ° 58’. The lake covers an area of 550 square kilometers and has a total water storage capacity of 10.8 billion M ~ 3. The water source comes from Tianchi, Changbai Mountain, the main tributaries such as the second Songhua River, Huifa River, Lafaye River and Jinsha River