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:: Volume 2, Issue 4 (10-2008) ::
jwmseir 2008, 2(4): 38-48 Back to browse issues page
Improving Disconnected Digital Stream Networks by Developing an Object Oriented Model in GIS Environment
Said mahmood reza Tabatabaei , Ali Reza Majidi , Mohammad Roghani
Soil Conservation & Watershed Management Research Centre,Iran
Abstract:   (7915 Views)

In research or applied study projects related to watersheds, stream network data layers are one of the

most important data used to calculate the parameters such as watershed physical parameters, runoff, sediment,

erosion and etc. These digital spatial data layers prepared in different formats and scales often have

deficiencies in their topology structures such as the disconnection of stream networks and inaccurate coincidence

of watershed flow direction pattern with digital direction of the streams. These deficiencies create

many problems in calculating watershed parameters whereas built-in facilities in current GIS softwares

also have basic restrictions in resolving them. In the present research, in the GIS environment, a new model

has been designed and developed to solve the GIS softwares problems in creating artificial stream networks

(from point of view of the numbers and position of streams and also threshold definition). In addition to

this, the developed model is capable of converting disconnected stream networks to connected ones. The

number and position of new created streams are equal to their original hydrographic networks and water

flow direction has been corrected based on watershed flow direction pattern. The extracted statistics results

of the research show high accuracy of the model outputs.

Keywords: ArcObjects, Avenue, DE, Disconnection, Flow Direction and Stream
Full-Text [PDF 715 kb]   (1342 Downloads)    
Type of Study: Research | Subject: Special
Received: 2013/01/27
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Tabatabaei S M R, Majidi A R, Roghani M. Improving Disconnected Digital Stream Networks by Developing an Object Oriented Model in GIS Environment. jwmseir. 2008; 2 (4) :38-48
URL: http://jwmsei.ir/article-1-82-en.html


Volume 2, Issue 4 (10-2008) Back to browse issues page
مجله علوم ومهندسی آبخیزداری ایران Iranian Journal of Watershed Management Science and Engineering
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