| 1. | By means of prototype observation , analysis with materials and theories , and laboratory test , the author deeply analyzed the causes and procedure of canal cross section erosion , and obtained eight causes which resulted the canal deform including flow , seepage , runoff , collapse of bank , dry effect , human activity , wave flush , frozen , and then stressed to discuss the frozen process
本文通过原型观测、资料分析、理论分析、室内试验对北引渠道变形的成因和发生机理进行了较为深入的分析研究，给出了造成北引渠道变形的八大原因：流水引起的变形、渗透引起的冲刷、地表径流引起的冲刷、滑坡变形、干燥作用、人类和动物活动的影响、风浪引起的冲刷、冻融侵蚀，并着重阐述了冻融侵蚀的机理。 |
