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雅砻江调水区的横向构造按成因可分为两种，剪切成因的横向构造不具有区域规模，有明显的构造断面，其形成与北西向构造有密切关系，具有多期活动性，后期的复活多是继承性的，与北西向构造的交汇部位是孕震的重要地段．张性的横向构造具有典型的弥散性，由一组构造面断续分布的断层、褶皱、裂隙及相关地貌组合而成，但延伸规模较大，是一种典型的叠加性构造，形成于早第四纪；其形成是基底隐伏断裂在张或剪应力的作用下重新活动的结果，变形强度由下到上逐渐减弱，变形逐步扩散；横向构造的发育既有对南水北调工程不利的一面，也有其有利的一面
The horizontal structure of Yalong River water diversion area can be divided into two types according to their genetic causes. The lateral structure of shear genesis does not have regional scale and obvious structural section. Its formation is closely related to the NW structure and has multi-period activities. The later resurrection is mostly inherited, and the junction with the NW structure is an important part of earthquake seismology. Tensile transverse structure has the typical diffusivity, formed by a combination of faults, folds, fractures and related landforms intermittently distributed by the tectonic planes. However, the extensional scale is a typical superimposed structure formed in the early Quaternary; its formation is the result of reactivation of hidden faults in the basement under the action of tension or shear stress. The deformation strength gradually decreases from bottom to top, and the deformation gradually diffuses. The development of lateral structure not only has the unfavorable side to the South-to-North Water Diversion Project, Its positive side