高原盆地城市水源地不同林分类型水源涵养功能评价——以东风水库为例

Evaluation on water conservation of different forests types in urban water sources in the plateau basin: Dongfeng Reservoir as a case

采用野外调查与室内分析相结合的方法,运用基于熵值的水源涵养能力相对优异性量化评价模型对云南省玉溪市东风水库集水区板栗林、冈栎林、圣诞树人工林、混交林(云南松与冈栎林混交)和杉木林5种林分的水源涵养能力进行评价。结果表明,各林分地形因子水源涵养能力依次为板栗林>圣诞树人工林>混交林>杉木林>冈栎林;林冠层水源涵养能力依次为冈栎林>混交林>杉木林>圣诞树人工林>板栗林;枯落物层水源涵养能力依次为冈栎林>圣诞树人工林>板栗林>混交林>杉木林;土壤层水源涵养能力依次为圣诞树人工林>混交林>冈栎林>板栗林>杉木林。总体来看,各林分的水源涵养功能依次为圣诞树人工林>冈栎林>混交林>板栗林>杉木林。

In the present paper, the quantitative evaluation on water conservation in Dongfeng Reservoir catchment was conducted via the entropy-based relative superiority quantitative model, with both field investigation and indoor analysis. Five main forest types in this area were selected as study objects, namely, chestnut forest, glauea forest, artificial Christmas forest, mixed forest of Pinus yunnanensis and glauea forest, and Chinese fir plantation. It was shown that the terrain water conservation capacity decreased in the order of chestnut forest 〉 artificial Christmas forest 〉 mixed forest 〉 Chinese fir plantation 〉 glauca forest. The water conservation capacity of canopy, litter and soil layer decreased in the order of glauca forest 〉 mixed forest 〉 Chinese fir plantation 〉 artificial Christmas forest 〉 chestnut forest, glauca forest 〉 artificial Christmas forest 〉 chestnut forest 〉 mixed forest 〉 Chinese fir plantation, and artificial Christmas forest 〉 mixed forest 〉 glauca forest 〉 chestnut forest 〉 Chinese fir plantation. Taking together, the water conservation capacity in different forests types was artificial Christmas forest 〉 glauea forest 〉 mixed forest 〉 chestnut forest 〉 Chinese fir plantation.