摘要
在分析1992—2020年伊犁河三角洲水资源条件和定量评估研究期内土地利用变化的基础上,选取景观类型水平和景观水平指数解析景观格局变化特征,采用皮尔逊相关系数分析了水资源条件变化对景观格局指数的影响。结果表明:乌斯热尔玛水文站年径流总体偏大,巴尔喀什湖年平均水位在2002年发生突变,三角洲水资源补给总体处于增加状态;湿地和稀疏植被面积增大且聚集性增强,裸地向稀疏植被转化且优势度不断下降,林地破碎程度剧烈;景观水平指数在时程上呈阶段性变化,2016年伊犁河三角洲破碎化程度最低,在空间上伊犁河沿岸连通性增强,巴尔喀什湖沿岸景观多样性增加;景观水平指数与巴尔喀什湖年平均水位相关性最高,与乌斯热尔玛水文站年径流量的相关性次之,与伊犁河三角洲年降水量的相关性最低,且景观水平指数对三角洲水资源条件变化存在迟滞响应。
The changes of water resources conditions in the Ili River Delta were analyzed,and land use changes during the study period were quantitatively evaluated.The change characteristics of landscape pattern were analyzed by using the landscape pattern indexes,including the landscape type level index and landscape level index,and the influence of water resources condition changes on the landscape pattern indexes was analyzed with the Pearson correlation coefficient.The results show that the volume of annual runoff at the Uskerma Hydrological Station was relatively large,the average annual water level of Balkhash Lake changed abruptly in 2002,and the water resources recharge in the delta was generally increasing.The areas of wetland and sparse vegetation increased,with the increase of their aggregation,the bare land was gradually transformed into sparse vegetation,with continuous decrease of its landscape dominance,and the fragmentation degree of forest was severe.Landscape level index showed a phased change in time course,and the fragmentation degree of the Ili River Delta was the lowest in 2016.Spatially,the landscape level index showed a gradual increase in connectivity along the Ili River,and the diversity increased along Balkhash Lake.The correlation of the landscape level index with the annual average water level of Balkhash Lake is the highest,followed by the correlation with the annual runoff at the Uskerma Hydrological Station,and the correlation with the annual precipitation in the Ili River Delta is the lowest.Furthermore,the landscape level index had a hysteresis response to the change of water resources conditions in the delta.
作者
陈启慧
纪璐
李琼芳
白浩男
韩幸烨
姚佳
崔罡
周正模
杨坤凡
CHEN Qihui;JI Lu;LI Qiongfang;BAI Haonan;HAN Xingye;YAO Jia;CUI Gang;ZHOU Zhengmo;YANG Kunfan(College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China;Yangtze Institute for Conservation and Green Development,Hohai University,Nanjing 210098,China;Bureau of Hydrology,Changjiang Water Resources Commission,Wuhan 430010,China)
出处
《水资源保护》
EI
CAS
CSCD
北大核心
2024年第2期90-99,共10页
Water Resources Protection
基金
新疆维吾尔自治区寒旱区水资源与生态水利工程研究中心(院士专家工作站)合作研究项目(2020.E-001,2020.E-002,2020.E-004)
中央高校基本科研业务费专项经费资助项目(B210204024,B210204025,B210204026)。
关键词
景观格局
水资源
移动窗口法
土地利用
伊犁河三角洲
landscape pattern
water resources
moving window method
land use
Ili River Delta
