基于DEM的平缓地区水系提取和流域分割的流向算法分析DEM-based flow direction algorithms study of stream extraction and watershed delineation in the low relief areas
张维,杨昕,汤国安,祝士杰,李彩丽
摘要(Abstract)：
本文以地势较为平坦的秦淮河流域为实验样区,以高精度DEM(5m分辨率)和地形图水系为基础数据,对比分析了单流向算法(D8算法)、多流向算法(Dinf法)以及添加数字化河道信息后的单流向算法(Agree&D8算法)3种算法下水系提取和流域分割的结果。实验结果表明,提取得到的水系更逼近于实际河网,该算法既有效提高了水系提取和流域分割的精度,又保留了D8算法模型简单、稳定性强、运行效率高等优点。
关键词(KeyWords)： 流向算法;DEM;平缓地区;水系提取;流域分割
基金项目(Foundation): 国家自然科学基金(40901185);; 国家自然科学基金重点基金(40930531);; 江苏省测绘科研基金(JSCHKY200910);; 南京师范大学研究生优秀学位论文培育计划项目(2010ss0013,2010bs0002)
作者(Author): 张维,杨昕,汤国安,祝士杰,李彩丽
DOI: 10.16251/j.cnki.1009-2307.2012.02.042
参考文献(References)：
- [1]乔飞,张万顺,崔鹏.基于DEM和水箱理论识别流域河网方法研究[J].测绘科学,2006,31(4).
- [2]周启鸣,刘学军.数字地形分析[M].北京:科学出版社,2006.
- [3]孙崇亮,王卷乐.基于DEM的水系自动提取与分级研究进展[J].地理科学进展,2008,27(1).
- [4]O’Callaghan J F,Mark D M.The extraction of drainagenetworks from digital elevation data[J].Computer Vi-sion,Graphics,and Image Processing,1984,28:323-344.
- [5]Fairfield J,Leymarie P.Drainage networks from griddigital elevation models[J].Water Resources Re-search,1991,27(5):709-717.
- [6]Lea N L.An Aspect Driven Kinematic Routing Algorithmin Overland Flow:Hydraulics and Erosion Mechanics[M].NewYork:Chapman&Hall,1992.Costa-CabralM C,Burges S J.
- [7]Costa-Cabral M C,Burges S J.Digital elevation modelnetworks(DEMON):A model of flow over hillslope forcomputation of contributing and dispersal areas[J].Water Resources Research 1994,30(6):1681-1692.
- [8]Tarboton D G.Anew method for the determination of flowdirection and upslope areas in grid digital elevation mod-els[J].Water Resources Research,1997,33(2).
- [9]Quinn P,Beven K,Chevalier V,et al.The predictionof hillslope flow paths for distributed hydrological model-ing using digital terrain models[J].HydrologicalProcesses,1991,(5):59-79.
- [10]秦承志,朱阿兴,李宝林,裴韬,周成虎.基于栅格DEM的多流向算法述评[J].地学前缘,2006,3(16):91-98.
- [11]Chengzhi Qin,et al.An adaptive approach to selecting aflow-partition exponent for a multiple-flow-direction algo-rithm[J].International Journal of Geographical Infor-mation Science,2007,21(4):443-458.
- [12]Turcotte R,Fortin J P,Rousseau A N,etal.Determination of the drainage structure of a watershedusing a digital elevation model and a digital river andlake network[J].Journal of Hydrology,2001,240(3-4):225-242.4.
- [13]郑子彦,张万昌,邰庆国.基于DEM与数字化河道提取流域河网的不同方案比较研究[J].资源科学,2009,31(10):1730-1739.
- [14]朱庆,田一翔,张叶廷.从规则格网DEM自动提取汇水区域及其子区域的方法[J].测绘学报,2005,34(2):129-133.