国土资源遥感Issue(3)：117-124,8.DOI:10.6046/gtzyyg.2014.03.19
植被对潮沟发育影响的遥感研究--以崇明东滩为例
Effects of vegetation on the dynamic of tidal creeks based on quantitative satellite remote sensing：A case study of Dongtan in Chongming
摘要
Abstract
Tidal channels, vegetation types and FVC ( fractional vegetation cover ) were extracted from high resolution aerial images according to the field measurement. Combined with multi-temporal satellite images and numerical ocean model, the authors employed the waterline and the width-to-depth ratio methods to inverse the tide creek bottom elevation, with which the Dongtan 3D terrain of Chongming was constructed. The effects of vegetation on tidal creeks were analyzed and some conclusions were reached: ①The root mean square error between the tidal channel calculation and the measured result is 0. 545 m at Dongtan of Chongming, and the accuracy is higher at high tide beach than at the low tidal beach;②From low to high tide flat, tidal channel depth increases first and then decreases along the longitudinal profile. The shallow tidal creek at the high tidal flat results from the weakness of water dynamics and beach consolidation by the vegetation roots, where downward erosion is inhibited. On the other hand, tidal channel becomes wide and shallow at the low tidal flat owing to lateral erosion without vegetation cover and weak hydrodynamics;③ Tidal channel depth is deep in the south and shallow in the south. The Dongtan tidal channel density and vegetation coverage show significant negative correlation (r=0. 560 4, p<0. 02), and tidal channel length has a significant corresponding relation with vegetation types. Tidal channel length is longer in Spartina alterniflora and reed communities than in Scirpus mariqueter areas. Tidal creeks are undeveloped in the tidal flat with high density vegetation coverage.关键词
卫星遥感/海洋数值模型/潮沟/地形反演/植被盖度指数/崇明东滩Key words
satellite remote sensing/numerical ocean model/tidal creeks/terrain reversion/fractional vegetation cover( FVC)/Dongtan of Chongming分类
信息技术与安全科学引用本文复制引用
郑宗生,周云轩,田波,王建,刘志国..植被对潮沟发育影响的遥感研究--以崇明东滩为例[J].国土资源遥感,2014,(3):117-124,8.基金项目
上海市教委创新项目(编号:11YZ157)、华东师范大学河口海岸学国家重点实验室开发基金(编号：SKLEC201207)和山东省海洋生态环境与防灾减灾重点实验室资助项目(编号:201211)共同资助。 （编号:11YZ157）
