drip irrigation with catchment of rainfall
Hetian River catchment areas
limited supplemental irrigation with catchment rai
limited supplementary irrigation with catchment ra
limited supplementary irrigation with catchment rainfall
supplementary irrigation with catchment of rainfall
supplementary irrigation with catchment rainfall
supplementing irrigation with catchment rainfall
areas with great difficulties
AREAS WITH HIGH AND COARSE SEDIMENT YIELD
areas with sand and coarse sediment
areas with weak tourism resources
the two areas with four generators
construction combining with management
control with management
disagreement with management