25 July 2007 High-resolution DEM extraction and its application in distributed hydrological model
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Abstract
The paper discusses a new method of acquiring small watershed terrain data from 3D laser scanner to make a High-resolution DEM with the help of GPS technology; and develops Distributed Hydrological modeling system based on TOPMODEL and linear reservoir theory. Resolution of DEM is an important factor which has decisive influence on the modeling veracity of Distributed Hydrological Model. The DEM built here can improve the precision to as high as 1m at the most. With the high-resolution DEM providing source data, the modeling system is applied in small catchments of Loess plateau. Finally the paper makes a comparative analysis on the two systems' stimulating precision, which is derived from a high-resolution DEM and a traditional DEM respectively. The result indicates that the precision of the hydrological modeling is much more enhanced; and that hydrological processes can be interpreted much more precisely, and the soil and water loss mechanism is more comprehensible.
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Fen Qin, Fen Qin, Xuejun Jiao, Xuejun Jiao, Feng Tian, Feng Tian, Yu Xing, Yu Xing, "High-resolution DEM extraction and its application in distributed hydrological model", Proc. SPIE 6753, Geoinformatics 2007: Geospatial Information Science, 67531Y (25 July 2007); doi: 10.1117/12.761863; https://doi.org/10.1117/12.761863
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