Table 2. Evaluation of the decadal contributions of land use and climate change to the local hydrology by comparison of the differences of simulated water yield between two scenarios in Heihe River Basin (HRB) with that for the three sub-basins.

Impact	Land use change	Climate change	Land use &climate change
1980s	M3–M1	M2–M1	M4–M1
1990s	M6–M4	M5–M4	M7–M4
2000s	M10–M8	M11–M10	M11–M8
1980–2009	M3 + M6 + M10−M1−M4−M8	M2 + M5 + M11−M1−M4−M10	M4 + M7 + M11−M1−M4−M8