随着东部沿海港湾地区的经济迅速发展和人工建设地貌的不断形成,港湾地区地貌格局也产生相应的变化。定量研究海岸带人工建设地貌时空格局变化,对全面科学合理地评价人类建设行为,具有一定的科学和实践价值。本文以象山港1990年、2000年、2010年及2015年4个时期TM/OLI遥感影像作为主要数据源,分析了25 a内象山港海岸带人工建设地貌强度变化,并进一步探讨其空间格局演变特征。研究表明:(1)象山港海岸带人工建设地貌发育呈现出早期高速增长、中期缓慢增加、后续强劲推进的态势,其面积增幅具有显著的历史阶段性特征;(2)各个县(市)区点状和面状地貌斑块数量整体波动上升,但其内部发育水平差异较大,宁海县与象山县地貌发育的速率与程度都处于领先水平;(3)其格局演化过程分为4个重要阶段:点状分散期,面状集聚期,条带状延展期与复合、更新扩散期。
Abstract
With the rapid development of the eastern coastal harbor region and the continuous formation of man-made landforms, the geomorphic pattern of the harbor area has also changed accordingly. Quantitative study of the spatial and temporal pattern changes of coastal artificial constructed landform can be a comprehensive scientific and practical evaluation of human construction behavior, and it has a certain scientific and practical value. Four periods TM/OLI remote sensing images of 1990, 2000, 2010 and 2015 from Xiangshangang Bay were taken as the main data source, the changes of artificial constructed landform intensity during the last 25 years in Xiangshangang coastal zone were analyzed and its spatial pattern evolution was further explored. The research shows: (1) The development trend of artificial constructed landform in the coastal zone of Xiangshangang Bay appears a rapid growth in the early stage, a slow increase in the medium term and a strong follow-up, and its area growth has significant historical characteristics. (2) The number of punctate and surface topographic patches in each county (city) area rise in fluctuation as a whole, but its internal development level varies greatly. The rate and degree of geomorphic development in Ninghai County and Xiangshan County are in the lead. (3) The pattern evolution process can be divided into four important stages: point-like dispersion period, surface aggregation period, strip extension period and compound, update the diffusion period.
关键词
人工建设地貌 /
人工建设地貌强度指数 /
空间格局演变 /
象山港海岸带
Key words
artificial constructed landform /
artificial constructed landform intensity index /
spatial pattern evolution /
coastal zone of Xiangshangang Bay
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基金
国家自然科学基金项目资助(41471004,U1609203);宁波市重大科技计划项目资助(2015C110001)
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