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乐山地区:位于成都市南。它包括总冈山脉与牧马山以南,岷江中游与青衣江、大渡河及马边河下游的主、支流水堰灌溉的大片地区。沿江有冲积平原,最大的为彭眉平原。岷江穿过青神县的外江三峡后,东岸有断续的小平原.经乐山大佛崖,与青衣江、大渡河合流后,东岸又现大平原,是为牛华溪五通桥平原(简称溪桥平原)。从五通桥以下,水行群山间,直至沐川河会合;再入山区,沿江只有断续的小平原了。青衣江上游属雅安地区,它从竹箐关以下,沿流有罗坝、止戈、洪雅、木城等小平原,过千佛崖后,平原开展二十多里,是为夹江城至甘江坝的大平原,古南安县治所在也。大渡河古称沫水,中游属泸定、石
Leshan area: located in Chengdu south. It includes a large area of irrigation to the main Okay and the south of the Wrangler, the middle reaches of the Minjiang River and the downstream of the Tsing Yi River and the Dabu River and the Mabian River. Alluvial plains along the Yangtze River, the largest Pengmei plains. After the Minjiang River passes through the Three Gorges of the Waig River in Qingxu County, there is a small plains on the east bank. After the Great Buddha Cliff of Leshan and the convergence of the Qingyi River and the Dadu River, Referred to as Creek Bridge Plain). From Wutongqiao following water line mountains, until Muchuanhe convergence; re-entry into the mountains, there are only intermittent plains along the Yangtze River. The upper reaches of Tsing Yi River is in the Ya’an area. It starts from below the Tso River and flows along Lo Wu, Zhigu, Hongya and Mucheng plains. After over a thousand Buddha cliffs, Dam of the Great Plains, Gunan County where the rule also. Dadu ancient name foam water, the middle reaches of Luding, stone