关键词: 景观类型区划, InVEST模型, 水源涵养, 评估, 北京山区

Abstract:

To comprehensively evaluate the water conservation function of different forest ecosystems in mountain areas of Beijing, the landscape of forests was classified based on the data of CategoryⅡof the sixth forest inventory in Beijing. Function of the forest ecosystems in water conservation was estimated by means of InVEST model. The total area of 479 209 hm² of Beijing mountain forests was divided into 18 forest types, and the total water conservation capacity was 1.62×10¹³ m³, equaling to average water conversation capacity of 75 mm. There was great difference in average water conversation capacity among various forest types. Larch plantation had the biggest capacity of 148 mm, while the other broadleaved tree species plantations had only 47.61 mm. Among all types of forests, the natural oak forest had the biggest total water holding capacity of 8.25×10¹² m³, while the other broadleaved tree species plantations had only 6.07×10⁹ m³.

Key words: landscape type division, InVEST model, water conservation function, evaluation, Beijing mountain area