Results and Analysis
Landuse/land cover map of the central watershed which is exhibited at a scale of 1:1000,000,based on visual analysis and interpretation of available Landsat data .

In this area, seven major units have been recognized as follows:

1. Urban or built-up lands:
   This unit consists of residential, industrial, commercial area and major transportation and communication.
2. Agricultural lands: This area consists of predominantly irrigated croplands, Dry farm croplands, Orchard, Vine Yards that occur predominantly in plains, around the residential area., along the rivers, gently slop in hills.
3. Range lands:
   This area consists of high, medium, low, poor production rangelands that mainly occurring on the mountains, hills and plains,
4. Forest lands: There is low density forest in this wate4rshed because of at low rain fall.
5. water
   This unit consists of the main natural drainage and four reservoirs.
6. Wel lands:
   This area cover by permanent and temporary salt water that consists of shruns and nonshrubs wet lands. Mainly occurring in the lowland areas.
7. Barren lands:
   Most of this area located on arid parts of watershed. It consists of salt flats and playas, sandy area, bare exposed rock.

Conclusions and Recommendarions
The following conclusions and recommendation obtained from results and analysis :

1. To achieve accurate and desirable results, the interpreters should nesting site well informed about the general geography conditions of the area and also be familiar with existing land form.
2. There should be logical relation between level of study and the chosen scale.
3. Using of imagery prepared in spring and autumn is more suitable for landuse/land cover mapping, but using imagery prepared at different times of the year could nesting site use full in interpretation of data.
4. Its better that the selected images should have uniform colour tone as well as good quality so that following land-use units from one image to another is smooth.
5. The accuracy interpretation for the several be about equal.
6. Utilization of all available data and field control is important for interpretation and accuracy for landuse/ land cover mapping.
7. Available and standardize classification system according to the natural characteristic of the country is necessary.

Table: Area coverage of the various landuse/land cover units in the Central watershed.

No	Unit	Area of Coverage(Square Kms.)	Percentage
1 2 3 4 5 6	Urban of built-up lands Agricultural lands Range lands Forest lands Wet lands Barren lands	540.6 25518.2 48473 71.4 6399.7 11122.1	0.59 27.69 52.61 0.08 6.95 12.08
Total		92125.0	100.0

Figure 1: Darinags and sub-basin map of the centeral watershed, base on landsat images.

Figure 2: Land use/landcover map of the centeral watershed, base on landsat images.