Determination of the upper limit for the proportion of cultivated land occupied by construction projects in Hubei Province based on threshold method

doi:10.14088/j.cnki.issn0439-8114.2025.09.008

Abstract

Abstract: In order to determine the upper limit for the proportion of cultivated land occupied by construction projects in different geomorphological zones, and to provide a basis for cultivated land protection and land use approval, Hubei Province was selected as the study area, and its land use data for three types of projects, namely, transport, water conservancy and energy, were collected from 2013 to 2022, and the geomorphology was divided according to plains, hills and mountains. The quartiles were used as threshold parameters to analyse the proportion of cultivated land occupied by each type of project in different geomorphological zones, determine the reasonable upper limit and calculate the saving rate. The results showed that there were obvious differences in the cultivated land occupation for the three types of projects in different geomorphological zones in Hubei Province. The area of cultivated land occupied by transportation was the highest (the proportion of 89.48%), and the spatial distribution showed a decreasing gradient of plains (68.3%)>hills (21.33%)>mountains (10.37%). Based on the quantile threshold method, the upper limit for the proportion of cultivated land occupied by the energy in the plains area reached 99.19%, while that of the mountainous water conservancy category was only 40.17%. The validation of the planning project showed that the maximum saving rate of 12.76% of cultivated land could be achieved while ensuring an approval rate of 78.05% or higher for most projects. In conclusion, the upper limit for the proportion of cultivated land occupied by construction projects determined by the threshold method could effectively control the cultivated land occupation. It was recommended to take 70%-90% as the reference threshold for the upper limit of the proportion of cultivated land occupied by various types of projects in different geomorphological zones, and select parameters in combination with specific project conditions to balance protection and development, so as to provide a decision-making basis for solving the contradiction between cultivated land protection and construction occupancy in Hubei Province.

Key words: construction projects, cultivated land occupation ratio limits, threshold method, cultivated land conservation, Hubei Province

CLC Number:

LI Jing-jing, HUANG Fan, ZHU Jun-jun, LI Yan-dan, LEI Yang, LI Jin-xin, KUANG Ying. Determination of the upper limit for the proportion of cultivated land occupied by construction projects in Hubei Province based on threshold method[J]. HUBEI AGRICULTURAL SCIENCES, 2025, 64(9): 44-50.

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