Study on the multiple objective linear planning applied in comprehensive control of small watershed—a case study from Mimagou small watershed in Shizhu County, Sichuan Province

Based on the Mimagou small watershed in Shizhu County, Sichuan Province, through building the four objective sub-functions, the multiple objective functions were integrated as an objective function using the expert^,s weight and directional coefficient and applying EXCEL software, the optimal solution of the multiple objective function planning model was determined. From the result, the land use of watershed becomes more reasonable, the ecology balance tends to harmonious, the proportion of agriculture-forestry-stock is adjusted from 23.32∶74.20∶2.48 to 24.23∶67.67∶8.1, the soil erosion modulus in a year falls from the original 1823t/km² to 1628.4t/km².