以湛江金沙湾海滩养护前后不同时期沉积物粒度监测数据、海底高程扫描数据和遥感影像为依据,运用Arc GIS 3D Analyst进行沉积物和海底地形分析,得出湛江市金沙湾海滩养护工程实施前后不同时期海底沉积物、地形表面和动态剖面变化情况。...以湛江金沙湾海滩养护前后不同时期沉积物粒度监测数据、海底高程扫描数据和遥感影像为依据,运用Arc GIS 3D Analyst进行沉积物和海底地形分析,得出湛江市金沙湾海滩养护工程实施前后不同时期海底沉积物、地形表面和动态剖面变化情况。结果表明,湛江金沙湾海滩侵蚀区域集中在风车广场对出海域和原红嘴鸥码头附近,后期应重点考虑对此区域进行修复重建。展开更多
The canals are designed to transport water to meet irrigation and other water demands or to divert water from surplus basins to deficient basins to meet the ever increasing water demands. Though the positives of canal...The canals are designed to transport water to meet irrigation and other water demands or to divert water from surplus basins to deficient basins to meet the ever increasing water demands. Though the positives of canal network are increase in agricultural output and improvement in quality of life, the negatives of canal introduction and irrigation, along its route, are inherent problems of water logging and salinity due to seepage from canals and the irrigation, when not managed properly. To plan strategies to prevent waterlogging and salinity, it is necessary to predict, in advance, the probable area which would be affected due to seepage. This paper presents a methodology to predict the area prone to water logging due to seepage from canal by using 2D seepage solutions to 3D field problem. The available analytical solutions for seepage from canals founded on pervious medium and asymmetrically placed drains, have been utilized. The area, prone to waterlogging, has been mapped using GIS.展开更多
文摘以湛江金沙湾海滩养护前后不同时期沉积物粒度监测数据、海底高程扫描数据和遥感影像为依据,运用Arc GIS 3D Analyst进行沉积物和海底地形分析,得出湛江市金沙湾海滩养护工程实施前后不同时期海底沉积物、地形表面和动态剖面变化情况。结果表明,湛江金沙湾海滩侵蚀区域集中在风车广场对出海域和原红嘴鸥码头附近,后期应重点考虑对此区域进行修复重建。
文摘The canals are designed to transport water to meet irrigation and other water demands or to divert water from surplus basins to deficient basins to meet the ever increasing water demands. Though the positives of canal network are increase in agricultural output and improvement in quality of life, the negatives of canal introduction and irrigation, along its route, are inherent problems of water logging and salinity due to seepage from canals and the irrigation, when not managed properly. To plan strategies to prevent waterlogging and salinity, it is necessary to predict, in advance, the probable area which would be affected due to seepage. This paper presents a methodology to predict the area prone to water logging due to seepage from canal by using 2D seepage solutions to 3D field problem. The available analytical solutions for seepage from canals founded on pervious medium and asymmetrically placed drains, have been utilized. The area, prone to waterlogging, has been mapped using GIS.
