Land suitability evaluation for development using a matter-element model: A case study in Zengcheng, Guangzhou, China

Abstract

Land suitability evaluation can assist in the efficient use of land resources at a regional level. This is an important issue because of the pressures that an increasing population and economic growth have put on limited land resources. Matter-element theory, which was first put forward by the Chinese mathematician Cai Wen, has shown potential for solving incompatibility problems. Based on the matter-element model, this paper uses land use, roads, water bodies, population density, distance from center of the city, geodetic height, and slope as factors in modeling land suitability for development. Zengcheng, an urban–rural administration was used as a case study for applying the matter-element model to assessing the suitability of land for development. The model was cross referenced with local urban plans for verification and the results of this study show that the model constructed was effective at assessing the suitability of land for development. According to both the classification map created using the matter-element model and the statistics on the of land suitability classes, the study area was found to have a considerable amount of land which is highly suitable for development. After the category ‘highly suitable’, the next largest total land area was in the category of ‘not suitable’ for development, while there was relatively little land classified as moderately and marginally suitable. The percentage of the total land area of each class of suitability was 41.80%, 34.22%, 16.35% and 7.64%, respectively. Apart from this, the study also demonstrated the advantage of matter-element models over fuzzy theory, as they provide much more information. For example, all integrated degree of all classes in the paper had ranges from −1 to 1, but differed from each other by percentage. In the category of ‘highly suitable’ only 45.51% of matter-elements fully conformed to the criteria (those within a range of 0–0.5925), while the remainder (54.49%) did not corresponded to the requirements of the category, but did have the potential to do so with relatively few changes (those within a range of −0.3923–0 degrees). This data provides us with an understanding of the potential and limitation to development of the land in the region.