The middle the middle and upper reaches of the Yel
The middle the middle and upper reaches of the Yellow River
historical floods in the middle reaches of the Yan
human activity in the middle reaches
In the middle reaches of Hanjiang River
irrigation districts along the lower reaches of the Yellow River
Rainfall in the lower reaches of the Yangtze River
Sandy soil along the lower reaches of Yangtze River
summer rainfall over the middle reaches of the Yangtze River
the flood disaster in the lower reaches of Yellow River
The lower reaches of Changjiang and Huaihe Rivers
the lower reaches of Heihe River
the lower reaches of Jinsha River
the lower reaches of Jinshajiang River
the lower reaches of Liaohe Plain
the lower reaches of Minjiang River
the lower reaches of Tarim River
the lower reaches of the Changjiang River
The lower reaches of the Heihe River
the lower reaches of the Jialing River