Since the recent decline in the available scale in Beijing will be difficult to reverse, the recent Beijing Water Reform and Development Conference clearly stated that Beijing will adopt the most stringent flexibility management system and establish a system to control the size of the population with water. The carrying capacity of colonies should be regarded as an important decisive factor in supporting urban development and population size, and measures should be taken according to water conditions.

According to the data provided by the Municipal Water Affairs Bureau in the "Beijing Statistical Yearbook," the reduction in 2009 fell from 3.42 billion cubic meters in the previous year to 2.18 billion cubic meters, a decrease of 36.3%. Among them, the per capita obesity fell from 205.5 cubic meters to 126.6 cubic meters, a drop of 38.4%. Diversion of water from Shanxi, Hebei and other places is a drop in the bucket; the South-to-North Water Diversion Project has been postponed repeatedly, and the distant water does not quench the thirst of the near. Population changes and tensions are due to the climate and human factors; the pressure brought by the existing population increase will cause the impact of population changes.

Water and people are closely related. It is of course necessary to control people with water and measure water. But beyond that, there can be many things to do to ensure the sustainable development of cities with water resources. Of course, from the perspective of managers, raising