Table 4 Summary table, the areas (ha) and the percent suitability of lands for the factors, sub-models and integrated models for small-scale and commercial fish farming in the Lake Tana basin
Land characteristics | Highly suitable (4) | Moderately suitable | Marginally suitable | Unsuitable | ||||
|---|---|---|---|---|---|---|---|---|
ha | % | ha2 | % | ha | % | ha | % | |
Socioeconomic s sub-model suitability | ||||||||
 Population density (per km2) | 774,188.2 | 64.5 | 335,653.9 | 28.0 | 0 | 0 | 90,179.2 | 7.5 |
 Consumption behavior | 217,267.2 | 18.1 | 388,253.2 | 32.4 | 287,898.5 | 24.0 | 306,602.4 | 25.5 |
 Production experience | 184,883.6 | 15.4 | 396,381.9 | 32.6 | 145,035.8 | 12.1 | 478,720 | 39.9 |
 Distance to district market center (km) | 216,512.9 | 18.0 | 456,938.1 | 38.1 | 313,220.9 | 26.1 | 213,349.3 | 17.8 |
 Road density (km/km2) | 358,947.7 | 29.9 | 610,010.0 | 50.8 | 230,005.7 | 19.2 | 1057.9 | 0.1 |
 Road Proximity (km) | 1,185,997.9 | 98.8 | 4023.4 | 1.2 | 0 | 0 | 0 | 0 |
 Sub-overall | 327,705.3 | 27.3 | 803,184.1 | 66.9 | 69,031.9 | 5.8 | 0 | 0 |
Input suitability sub-model | ||||||||
 Total amount of manure from livestock (tones) | 1,200,021.0 | 100 | 0 | 0 | 0 | 0 | 0 | 0 |
 Crop land tonnage/km2 | 652,448.0 | 54.4 | 8433.7 | 0.7 | 539,139.6 | 44.9 | 0 | 0 |
 Land cover and use | 239,751.0 | 20.0 | 762,289.3 | 63.5 | = | = | 197,981.0 | 16.5 |
 Sub-overall | 657,983.4 | 54.8 | 542,037.5 | 45.2 | 0 | 0 | 0 | 0 |
Water availability sub-model | ||||||||
 Annual rainfall amount (mm) | 826,360.8 | 68.9 | 352,028.8 | 29.3 | 21,631.7 | 1.8 | 0 | 0 |
 Perennial river density (per district) (km/km2) | 0 | 0 | 0 | 0 | 1,067,649.74 | 89.0 | 132,371.54 | 11.0 |
 Proximity to perennial river (km) | 194,365.8 | 16.2 | 268,294.8 | 22.4 | 150,233.4 | 12.5 | 587,127.3 | 48.9 |
 Proximity to water bodies: lake and reservoirs (km) | 54,104.2 | 4.5 | 58,120.9 | 4.8 | 38,721.8 | 3.2 | 1,049,074.3 | 87.4 |
 Sub-overall | 402,595.9 | 33.5 | 702,548.8 | 58.6 | 94,876.6 | 7.9 | 0 | 0 |
Water quality sub-model | ||||||||
 pH | 1,503,300.87 | 100 | 0 | 0 | 0 | 0 | 0 | 0 |
 DO (mg/l) | 1,149,109.1 | 76.4 | 316,317.8 | 21.0 | 37,874.0 | 2.5 | 0 | 0 |
 Temperature (°C) | 40,857.2 | 2.7 | 1,434,139.9 | 95.4 | 28,303.8 | 1.9 | 0 | 0 |
 Sub-overall | 40,853.84 | 2.7 | 1,462,441.0 | 97.3 | 0 | 0 | 0 | 0 |
Soil suitability sub-model | ||||||||
 Soil texture (%) | 63,364.8 | 63.6 | 310,541.1 | 25.9 | 99,842.2 | 8.3 | 26,273 | 2.2 |
 Slope (%) | 258,173.2 | 21.5 | 284,411.5 | 23.7 | 172,799.2 | 14.4 | 484,637.5 | 40.4 |
 Soil pH | 264,728.2 | 22.1 | 869,479.0 | 72.5 | 65,814.1 | 5.5 | 0 | 0 |
 Sub-overall | 326,417.6 | 27.2 | 661,935.4 | 55.2 | 204,973.7 | 17.1 | 6694.6 | 0.6 |
Urban markets and proximity sub-model (commercial farming) | ||||||||
 Urban market (population) | 407,851.1 | 34.0 | 792.170.2 | 66.0 | 0 | 0 | 0 | 0 |
 Proximity to district capitals (km) | 1,200,021.3 | 100 | 0 | 0 | 0 | 0 | 0 | 0 |
 Sub-overall | 407,844.2 | 33.9 | 792,177.5 | 66.1 | 0 | 0 | 0 | 0 |
Final overall suitability for small-scale fish farming | ||||||||
| Â | 32,678.9 | 2.7 | 1,166,594.5 | 97.2 | 747.8 | 0.1 | 0 | 0 |
Final overall suitability for commercial fish farming | ||||||||
| Â | 16,768.2 | 1.4 | 1,183,253.0 | 98.6 | 0 | 0 | 0 | 0 |