摘要
【目的】增进对景观要素稳定性的理解.【方法】运用分形理论对甘肃省崇信县的景观要素在地形影响下的分形特征及稳定性进行了研究.【结果】景观要素的分布具有分形结构.在坡度影响下,各景观要素的分形维数介于1.061~1.990之间,稳定性指数变化范围为0.004~0.490,稳定性最小的为其他用地,最大的为水域;在海拔影响下,各景观要素的分形维数介于1.053~1.944,稳定性指数的变化介于0.011~0.447,稳定性最小的为草地,最大的为水域;坡向影响下,景观要素的分形维数介于1.291~1.994,稳定性指数变化范围为0.028~0.494,稳定性最小的为园地,最大的为水域.根据稳定性指数的平均值和变异程度,坡度影响下稳定性从大到小排序为:水域>河流水面>交通运输用地>林地>其他用地>耕地>居民点及工矿用地>草地>园地.海拔影响下稳定性从大到小的排序为:水域>交通运输用地>河流水面>耕地>园地>其他用地>林地>居民点及工矿用地>草地.坡向影响下稳定性从大到小的排序为:水域>其他用地>河流水面>林地>园地>居民点及工矿用地>交通运输用地>耕地>草地.【结论】受地形因素的影响,居民点及工矿用地、交通运输用地和耕地等引入型斑块的稳定性较差,在土地利用规划中应重视小斑块对维持景观稳定性的作用.
[Objective] To understand the stability of landscape elements. [Method] The fractal and stability of landscape elements were studied under the influence of topographic factors in Chongxin County of Gansu Province. [Result] All the landscape elements had fractal characteristics. Under the influences of slope the fractal dimension （FD） values varied from 1. 061 to 1. 990, stability index value varied from 0. 004 to 0. 490. The stability of other land was the weakest,the water was the strongest. Under the influences of altitude,the FD values varied from 1. 053 to 1. 944,stability index value varied from 0. 011to 0. 447. The stability of grassland was the weakest,the water was the strongest. Under the influence of aspect, the FD values varied from 1. 291 to 1. 994, stability index value varied from 0. 028 to 0. 494. The stability of garden was the weakest, the water was the strongest. According to the mean and the variation degree of stability index,the order of stability under the influence of slope was as. water 〉 river 〉 transportation land forest 〉 other land 〉 farmland 〉 residential and industrial land 〉 grassland 〉 garden. The order of sta- bility under the influence of altitude was as. water 〉 transportation land 〉river 〉 farmland 〉 garden other land 〉 forest 〉 residential and industrial land〉grassland. Under the influence of aspect, the stabili- ty sort order was as. water 〉 other land 〉 river〉 forest〉 garden 〉 residential and industrial land transportation land 〉 farmland 〉 grassland. [Conclusion] Affected by topographic factors, the stability of residential and industrial land, transportation land and farmland were the weakest. It is suggest to pay more attention to the small patches role in the maintenance of the stability in the land use planning.
作者
唐正霞
刘学录
TANG Zheng-xia LIU Xue-lu(College of Resource and Environment,Gansu Agricultural University,Lanzhou 730070,Chin)
出处
《甘肃农业大学学报》
CAS
CSCD
北大核心
2017年第4期149-157,共9页
Journal of Gansu Agricultural University
基金
国土资源部公益性项目(201111015-02)
关键词
分形理论
地形
景观要素
稳定性
崇信县
fractal dimension
topographic
landscape elements
stability
Chongxin County
