arid inland river basins
arid inland river irrigation area
arid inland river irrigation areas
Hexi inland river basin
inland basin in northwestern China
northwest arid inland basin
ecological compensation in river basin
hydropower resources development in river basin
Jinshajiang River River Basin
Lancang river basin in Yunnan Province
Weihe River basin in Guanzhong
Yellow River Basin in Qinghai Province
Arid region in North China
Arid region in Northwest China
arid region in Northwestern China