赣州古城最重要的防洪措施是位于城墙中的水窗，它具有两个重要功能。排出城

The most important flood control measure in the ancient city of Ganzhou is the water window in the city wall, which has two important functions. Drain the accumulated water in the city to prevent flooding from backlogging. The functionality of water windows is also realized by city walls, buffer zones, and drainage pipes. As shown in the figure, in normal years, the water level of the river is low. Because the inner city is higher than the river bed, the accumulated water in the city will be discharged into the buffer zone along the pipeline through the water window, and a certain amount of water will accumulate and continue to be discharged along the drainage pipeline in the city wall. river. <br>When the water level of the river rises and the water level exceeds the topography of the city, the river water will be poured into the buffer zone along the drainage pipe. Because the water window has a special structure similar to the venous valve in a blood vessel, it will be affected when the buffer water level exceeds the height of the water window. The pressure is automatically closed to prevent floods from flowing back to the inner city, so as to ensure urban drainage while preventing floods from flowing back.

The most important flood control measure of the ancient city of Luzhou is the water window located in the city wall, which has two important functions. Drain the water from the city and prevent flooding. The functionality of the water window is also achieved by wall walls, buffer zones, and drainage pipes. As shown in the figure, in normal years, the river level is low, because the inner city is above the riverbed, the city's water will be along the pipe through the water window into the buffer zone, the accumulation of a certain amount of water continues along the wall drainage pipe discharge into the river.<br>When the river level rises, the water level exceeds the city, the river will be poured along the drainage pipe to the buffer zone, because the water window has a special structure similar to the vein flaps in the blood vessels, in the buffer zone water level exceeds the height of the water window will be automatically closed by pressure, to prevent flooding to the inner city, so as to ensure the city drainage at the same time, to prevent flooding.

The most important flood control measure of Ganzhou ancient city is the water window in the city wall, which has two important functions. Drain the water in the city to prevent the flood from flowing back. The functionality of water windows is also achieved by walls, buffers, and drainage pipes. As shown in the figure, in normal years, the water level of the river is low. As the terrain of the inner city is higher than the riverbed, the accumulated water in the city will be discharged into the buffer zone along the pipeline through the water window, and a certain amount of water will continue to be discharged into the river along the drainage pipeline in the city wall.<br>When the water level of the river rises and the water level exceeds the terrain of the city, the river water will flow back into the buffer zone along the drainage pipeline. Because the water window has a special structure similar to the vein valve in the blood vessel, when the water level in the buffer zone exceeds the height of the water window, it will be automatically closed under pressure to prevent the flood from flowing back to the inner city, so as to ensure the urban drainage and prevent the flood from flowing back.