Abstract: 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， glauca forest， artificial Christmas forest， mixed forest of Pinus yunnanensis and glauca 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>glauca forest>mixed forest>chestnut forest>Chinese fir plantation.

Key words: urban water sources, water conservation, forest soil