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Physics learning aims to make students gain not only facts but also understanding scientific concepts. Physics learning approach can be taken from the surrounding environment, so the students are able to directly imagine the natural phenomena and connect them to physics. One branch of physics that has a lot of phenomena is fluid mechanics (static and dynamic). Fluid dynamics can be learned using river current such as Semarang East Floodway. Students can learn about debit, current velocity, volume, topographic, and flood hydrograph. Students also can learn about canal-s functions and problems, and how to decrease flood threatening using physics method. From the topographic map, students can understand about meander that happened in upstream canal (Penggaron River), erosion and sedimentation in the river body, narrowing under the traffic bridge, delta at the mouth of river (towards the Java Sea) which is used as a pond. Physics learning along the Semarang East Floodway was able to make contextual physics teaching materials for students.