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(一) 琼江(又名安居河,有的地图上叫关溅河)是嘉陵江的支流,发源于乐至,流经遂宁、安岳、潼南、铜梁等县,在铜梁安居镇汇入嘉陵江。这五个县除铜染有少部分低山外,绝大部分是丘陵,在四川盆地中部有一定的代表性。该流域总幅员面积8,772平方公里,人口483.79万,每平方公里人口密度551人,最高的遂宁达617人,最低的潼南495人。耕地面积526万亩,占幅员面积的0%,每人平均1.05亩。这里属亚热带湿润季风气候,春早、夏长、秋短、冬无严寒,无霜期长,
(1) Qiongjiang (aka Anju River, and some maps called Guanzheng River) are tributaries of the Jialing River and originate from Lezhi and flow through counties such as Suining, Anyue, Tongnan and Tongliang, Import Jialing River. The five counties except for a small part of the copper dyed mountains, most of them hilly, in the central Sichuan Basin has a certain representation. The basin covers an area of 8,772 square kilometers with a population of 4,837,900 and a population density of 551 people per square kilometer, with the highest of 617 Suining and the lowest of 495 people in Tongnan. The area of cultivated land is 526 mu, accounting for 0% of the total area, with an average of 1.05 mu per person. Here is a subtropical humid monsoon climate, early spring, summer long, short autumn, winter without cold, long frost-free period,