Title :
DEM and ArcGIS-Based Extraction of Eco-Hydrological Characteristics in Ya´an, China
Author :
Ni Fu-quan ; Tan Yao-sheng ; Xu Li-ping ; Fu Cheng-wei
Author_Institution :
Coll. of Inf. & Eng., Sichuan Agric. Univ., Ya´an, China
Abstract :
This paper, on the basic principles of extraction of hydrological information by DEM (Digital Elevation Model), applies the toolkit in ArcGIS 9.0 for the analysis of the hydrological information, extracts eco-hydrological characteristics of stream basins in Ya´an. Information such as flow direction, flow accumulation, flow length, stream networks, and snap pour point are obtained. The spatial distribution of stream networks, with catchment area threshold beyond 9900, has the maximum similarity with the actual river system. ArcGIS 9.0 thematic maps and comprehensive evaluation could be done about single factor and combined factors of health risk caused by carcinogens and non-carcinogens in rural drinking water quality of the seven counties and one district in Ya´an City, so as to provide scientific basis for water governance and data support for further research of ecohydrology in Ya´an.
Keywords :
digital elevation models; ecology; geographic information systems; hydrology; ArcGIS 9.0 thematic maps; ArcGIS-based extraction; China; DEM; Ya´an City; actual river system; digital elevation model; ecohydrological characteristic extraction; health risk; hydrological information; noncarcinogens; rural drinking water quality; stream basins; water governance; Cities and towns; Data mining; Digital elevation models; Displays; Educational institutions; Environmental factors; Information analysis; Risk management; Rivers; Social factors;
Conference_Titel :
Intelligent Systems and Applications (ISA), 2010 2nd International Workshop on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-5872-1
Electronic_ISBN :
978-1-4244-5874-5
DOI :
10.1109/IWISA.2010.5473679
