Evaluation of land resources carrying capacity in Harbin

While dealing with the COVID-19 pandemic crisis, we have realized that sustainable living environment is very important for human survival. The natural resource and material carrier of urban environment is land. As a kind of resource, it is the most basic and important guarantee in the process of human production and life development.The sustainable use of land means that human beings have a long-term living environment. The evaluation of the carrying capacity of land resources is helpful for effectively formulating the development plan of land resources, which is of great practical significance to promote the sustainable use of land resources. Based on the Harbin data of urban economic and social development and land resource development, this paper establishes an evaluation system of land resource carrying capacity in Harbin, which includes four aspects: population carrying capacity, ecological carrying capacity of construction land, carrying capacity of construction scale and economic carrying capacity. This paper evaluates and analyzes the carrying capacity of land resources in Harbin, and obtains the following results. (1)The population carrying capacity of land resources in Harbin is divided into two parts for quantitative evaluation.One is the population carrying capacity of urban construction land, and the other is the population carrying capacity of cultivated land. In the population carrying capacity of urban construction land, this paper uses the per capita index method to evaluate the population carrying capacity of different regions, and draws the conclusion that the population carrying capacity of different regions is unbalanced, which is higher in the city center and the East the West than in other regions. In the evaluation of cultivated land carrying capacity, it calculates the ratio of the total local grain output to the per capita grain consumption standard (400kg). It can be seen that the population carrying capacity of land resources in Harbin is far greater than the pressure of local population, but the distribution of that in different region is unbalanced. (2)In the ecological carrying capacity of construction land, the ecological suitable amount of construction land in Harbin is 8221km2, and the area of urban construction land is smaller than that of ecological suitable construction land, which shows that the ecological carrying capacity of construction land can not only fully bear the current pressure of construction land development in Harbin, but also has half of the bearing space. (3)In the carrying capacity of construction scale, Harbin's comprehensive plot ratio is 0.58, slightly higher than the national average plot ratio of 0.56. It shows that the scale of land resources construction in Harbin still has certain potential. (4)The economic carrying capacity is based on the average GDP of land. In 2018, Harbin achieved a national GDP ranking of 32 (630.05 billion yuan), but its GDP per capita ranked 94. It shows that the economic carrying capacity of land resources in Harbin is relatively weak, but it also shows that the potential of urban land value-added is very large. The conclusion is that the carrying capacity of land resources in Harbin is relatively high and has certain potential, and it can support the current economic, social, development and construction activities.