跨学科主题学习旨在引导学生运用多学科知识解决复杂的现实问题。本文以浙东地区典型水利工程“碶桥”为乡土地理案例，基于问题式教学，通过整合地理、科学、语文、历史、道德与法治等多学科知识，围绕“守护水脉”“传承文脉”两大主题及“何以立碶”“何以兴文”“何以载道”“何以续脉”四大环节构建探究项目与问题链，引导学生从地理制约、文化象征、人地协调等角度探究碶桥的科学原理、文化价值与时代意义，为地理跨学科教学及乡土地理资源开发提供实践参考。

Interdisciplinary thematic learning aims to guide students in applying knowledge from multiple subjects to address complex real-world problems. This paper adopts the typical water conservancy project “Qiqiao” in eastern Zhejiang as a case study in local geography. Using a problem-based learning format, it integrates knowledge from geography, science, Chinese language, history, ethics and rule of law, and other disciplines. Centered on the two themes of “protecting water veins” and “continuing cultural heritage,” the study designs an inquiry-based project and a problem chain structured around four tasks: “why was Qiqiao built,” “how did it foster culture,” “how does it convey values,” and “how can its legacy be sustained.” Through this framework, students are guided to explore the scientifi c principles, cultural value, and contemporary signifi cance of Qiqiao from perspectives such as geographical constraints, cultural symbolism, and human–environment coordination. The study provides a practical reference for interdisciplinary geography teaching and the development of local geographical resources.