土地利用变化对芝罘连岛沙坝附近海岸带的影响

摘要

在RS，GIS技术支持下，经过遥感影像解译获取了研究区1979，1989，1997和2007年4个典型时期土地利用信息，通过对土地利用变化分析，表明近30a来建设用地始终大幅增长，耕地一直大量减少，养殖池和河漫滩从无到有，其他地类呈波动式变化。在快速城市化进程中人类活动对芝罘连岛沙坝附近海岸带产生了深刻影响：其土地利用形式彻底改变，滩涂向养殖池和建设用地转变，面积大幅减少；岸线形状发生变化，岸线长度增长，自然海岸消失，人工海岸建设不断向海延长，连岛沙坝变宽的同时地表被人工建筑覆盖；海底冲淤发生动态变化。总之，土地利用变化已经深刻影响了芝罘连岛沙坝及附近海岸带的变化，对这一问题的深入研究可为本地区海岸开发管理服务，也对实现海岸带可持续利用具有现实的研究价值。%This study aimed at revealing the influence of changes of land use on the coastal zone near the Zhifu Island tombolo. Based on remote sensing images, spatial-pattern changes of land use of the study area were obtained with GIS software in the typical periods of 1979, 1989, 1997 and 2007. We found a substantial increase in construction land and a corresponding decrease in arable land, and culture ponds and flood plain appeared gradually and other land types fluctuated. Rapid urbanization impacted greatly on the coastal zone near the Zhifu Island tombolo, and led to a thorough change of land cover pattern. It was found that tidal flat was transformed into culture ponds and construction land, so its area remarkably reduced. As for coastal line shape, natural coastline disappeared and artificial coastline extended to the sea. The Zhifu Island tombolo covered by artificial construction became broadened, and the erosion and deposition were dynamically changed in the waters near the island tombolo. In a word, changes in land use have a profound impact on the Zhifu Island tombolo and the nearby coastal zone. In-depth studies on this issue will provide coastal development and management with insights of sustainable use of coastal zone.