in Arc GIS it is possible to measure morphometric characteristics of a basin, but I face difficulty to compute the above parameters. How can I compute it? help help. Thank you.
In Arc GIS you can calculate the length of the main stream and the perimeter/basin length. Yoe have to open the attribute table of the stream layer. click on the "Table Options" tab then select the "Add Field" option there. Then in the "Add Field" dialogue box u may provide the name, type (double) and precision and click "OK". then the name provide u can bee seen in the attribute table as a column.Then go to editor tool bar and click on editor and select "start editing" and select the stream layer that u are going to edit. Then again open the attribute table of the stream and right click on the new column heading u created. Select the Calculate geometry from the drop down list. Then u may calculate the length of the stream by units u select there. Then click OK button and u may see the actual length of the strem in the column u created. Do the same for the Basin length.
In Arc GIS you can calculate the length of the main stream and the perimeter/basin length. Yoe have to open the attribute table of the stream layer. click on the "Table Options" tab then select the "Add Field" option there. Then in the "Add Field" dialogue box u may provide the name, type (double) and precision and click "OK". then the name provide u can bee seen in the attribute table as a column.Then go to editor tool bar and click on editor and select "start editing" and select the stream layer that u are going to edit. Then again open the attribute table of the stream and right click on the new column heading u created. Select the Calculate geometry from the drop down list. Then u may calculate the length of the stream by units u select there. Then click OK button and u may see the actual length of the strem in the column u created. Do the same for the Basin length.
Tamasha has it right and nothing to add. If you're using QGIS, or another program, check with the user groups there, or the tutorials (QGIS has a dandy one) to see how to translate this answer into the specific software.