Journal of Geographical Sciences ›› 2001, Vol. 11 ›› Issue (3): 336-349.

• Land Use & Soil Environment • Previous Articles     Next Articles

Effect of spatial pattern on nutrient reduction in the Liaohe Delta

LI Xiu-zhen, XIAO Du-ning, HU Yuan-man, WANG Xian-li   

  1. Institute of Applied Ecology, CAS, Shenyang 110016, China
  • Received:2001-03-20 Revised:2001-04-30 Online:2001-07-25 Published:2010-09-09
  • Supported by:

    National Natural Science Foundation of China, NSFC 49631040, 40001002; Wageningen Agricultural University, the Netherlands; Co-sponsored by the Key Laboratory of Remote Sensing and GIS, Jiangsu Province and Special Fund for Returning Scholars from Abroad, Ministry of Education, China.

Abstract:

The effect of spatial pattern on the nutrient reduction is investigated based on the spatial simulation model developed for the study area of the Liaohe Delta, China. Four scenarios are designed to test the effect of different landscape components on the nutrient reduction in the reed marsh: Canal density, reed area size, reed area shrinking pattern, and pumping station position. Based on a spatial model designed for the study area, the nutrient reduction in each case of these scenarios is simulated. The results indicate that each factor brings less than 10% change in the total nutrient reduction rate. More canals will not help much to improve nutrient reduction. Smaller areas are more efficient than larger ones. The shrinkage pattern is better than others in keeping a higher nutrient reduction rate. It is also more efficient to keep the pumping station near the border of the area to be irrigated. These conclusions provide theoretical supports to strategy makers for local land use planning, and contribute to the understanding of the relationship between landscape patterns and functions.

Key words: pattern effect, nutrient reduction, wetland, canal density, area size, shrinking pattern, pumping station position

CLC Number: 

  • Q149