在川东渝西及滇中滇西地区 ,广泛分布着在侏罗纪、白垩纪干热气温条件下形成的以泥岩和泥质粉砂岩为主的红色岩层 ,总面积 2 9 5 5万km2 ,涉及 16 3个县 (市、区 ) ,5 45 9万人口 ,其中常年缺水的人口达975 5万多人。这片红层地区 ,由于地质及水文、气候等多种因素的影响 ,区 In eastern Sichuan and western Yunnan and central and western Yunnan, red mudstone and muddy siltstone-dominated red rock formations are widely distributed under Jurassic and Cretaceous dry-hot temperatures with a total area of ​​25.5 million km2 Involving 16 3 counties (cities and districts) with a population of 45.49 million, of whom the population is over 9,755,000 with annual water shortage. This red zone, due to geological and hydrological, climate and other factors, the district