“avoid peak and fill up valley” measures

1998 summer heavy precipitation in the Yangtze and Huaihe River valley

6 cities of the Yangtze River Valley

acclinal valley

Aggraded Valley

aggraded valley floor

ALLUVIAL VALLEY

Alluvial valley containing multiple circular-arc l

alpine river valley in Tibet

anaclinal valley

ancient Yangtze River valley

Ancient Yellow River Valley

Anning river valley

antecedent valley

anticlinal valley

Aojiang valley

Aqike valley

Arid arid hot valley

arid hot valley land of Yuanmou

Arid Hot Valley of Jinsha River