The ecological environment of dry-hot valley in Jinsha River

where landslide and debris flow mountain hazards have frequently occurred

and with heavy soil and water loss

is very fragile. In this paper

the vegetation rehabilitation techniques and ecological effects in the Xiaojiang Basin are studied. Based on different site conditions and plants biological characteristics

seven rehabilitation measures are set up in the dry-hot valley. The results of ecological effects

which are studied by artificial rainfall and contrasting method

indicated that: the vegetation e- cological effects are very good in staying water and soil and improving soil infiltration function. In bare land

bare trees and herbs land

shrubs and herbs land

the time of bringing surface runoff is 31

34

75 min after artificial rainfall respectively

and the time of stable surface runoff ratio is 61

79

150 min respectively. The ration of stable runoff is 6. 20

3. 04

0. 64 L/ min respectively. The average ratio of sediment is 6. 8

4. 2

2. 0 g/L respectively.