JOURNAL OF NATURAL RESOURCES ›› 2014, Vol. 29 ›› Issue (9): 1542-1551.doi: 10.11849/zrzyxb.2014.09.009

• Resources Evaluation • Previous Articles     Next Articles

Grading of Seawater for Mariculture Use in Jiangsu Province

ZHANG Xiu-ying1, ZHONG Tai-yang2, HUANG Xian-jin2, LI Xin-hui1, ZHANG Xiao-min1, WANG Ying1, PENG Wei1, ZHANG Lin-jing1   

  1. 1. Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, International Institute for Earth System Science, Nanjing University, Nanjing 210023, China;
    2. Department of Land Resource and Tourism Sciences, Nanjing University, Nanjing 210023, China
  • Received:2013-09-18 Revised:2013-11-20 Online:2014-09-20 Published:2014-09-20

Abstract:

The classification and grading of seawater could provide scientific basis for valuating,levying, and planning for sea use. Taking 0.01° × 0.01° as the evaluation unit, this study assessedthe sea area for mariculture use in Jiangsu Province. The integrated index method wasused to do the evaluation, based on the five sub-index groups, namely, the physical environmentalconditions, physical and chemical properties of seawater, marine nutrient content, abundanceof biological resources and geographic conditions. The limiting factors, such as pollutantcontent in seawater and policy, were also employed to assess the mariculture use. The weightsfor the index were determined by principal components analysis when these indexes are highlycorrelated with each other. Otherwise, the weights for the index were determined by expert assessmentmethod. The evaluation results were classified into seven grades at equal value range.If the limiting factors were not considered in the evaluation process, the area at low grades (1-3) accounted for 30.72%, and the high grades (4-7) accounted for 69.28%. If the pollution conditionswere considered, about 4638 km2 seawater could not be used for mariculture. The areaat low grades accounted for 27.79%, the high grades accounted for 56.71%, and the substandardgrades accounted for 15.50%. If we only evaluated the mariculture area based on marinefunction zoning (5655 km2), then 68.70% was located in the area of high grades, while about24.88% was located in the area of substandard grades.

Key words: marine resource in Jiangsu, gradation, mariculture

CLC Number: 

  • S931.4