摘要
在分析了江苏省湖泊形态存在问题的基础上,利用湖泊岸线发育系数、分形维数为指标,选择江苏省具有代表性的13个湖泊,分析其1971年到2010年近40年的形态变化特征。研究结果表明,①目前江苏省湖泊形态存在"湖泊面积快速缩减"、"湖泊严重淤积"、"岸线日趋模糊"、"湖泊岸线严重水泥固定化"等突出问题。②江苏省13个典型湖泊近40年中,前30年总面积和周长年均下降分别为44.785km2/a、15.16km/a;后10年年均下降分别为25.315km2/a、31.50km/a;面积的下降速度后10年有所减缓,但周长的下降速度反而急剧增加。③近40年江苏省湖泊岸线发育系数总体上呈下降趋势,湖泊岸线形态日趋简单。④1971、2000和2010年13个湖泊岸线周长对数与湖泊面积对数存在着显著的线性回归的关系。⑤2000年的分形维数值(D=1.262)较1971年的分形维数值(D=1.230 4)大。江苏省湖泊形态近40年变化剧烈,近10年有所好转,但不容乐观。
On the basis of the existing problems,Lakes morphological characteristics of the 13 lakes in Jiangsu province during the past 40 years from 1971 to 2010 were analyzed by using development coefficient of lake shoreline,fractal dimension as the index.The results showed that： ①At present the lake morphology in Jiangsu province existed outstanding problems ＂rapid reduction of lake area ＂,＂lake serious deposition＂,＂More fencing breeding lead to lakes shoreline fuzzy＂,＂lakes shoreline becoming hard＂.②during the past 40 years,first 30 years the total area and perimeter dropped down by 1 343.55 km2,454.79 km respectively,with an average annual drop 44.785 km2,15.16 km;Recent 10 years down by 253.15 km2,314.99 km,with an average annual drop 25.315 km2 and 31.50 km;the descending velocity of Area in the recent 10 years becam low,but the descending velocity of perimeter increased dramatically.③During the past 40 years,development coefficient of Lake Shoreline in Jiangsu province had been declining,Lake Shoreline more simple.④The perimeter logarithm and lake area logarithm of 13 lakes had a significant relationship of linear regression in 1971,2000 and 2010.⑤the fractal dimension in 2000（D=1.262） was bigger more than 1971（D=1.230 4）,which showed that excessive interference had made serious destruction to the structure and form of the lakes,and lakes shoreline became poor stability;Fractal dimension in 2010 was 1.112 6,the fractal dimension declined obviously,and lakes protection measures began to appear.During the past 40 years,lake morphology of Jiangsu province dramatic changes,in recent 10 years it has been improved,but not optimistic.
出处
《灌溉排水学报》
CSCD
北大核心
2012年第5期103-107,共5页
Journal of Irrigation and Drainage
基金
国家"十二五"科技支撑计划项目(2012BAJ25B09)
贵州省科学技术基金(黔科合J字[2009]2030号)
贵州省科技计划(黔科合院所能[2010]4001)
贵州省省长基金(黔省专合字J字[2010]76)
江苏省水利厅公益性项目
贵州师范学院环境科学特色重点学科专项基金
关键词
江苏
湖泊
形态
动态变化
Jiangsu
lakes
morphology
dynamic changes
