On the basis of the principles of landscape ecology

a indicator system of regional landscape patterns was proposed.Using 3S technique and TM remote sensing image

some useful data was obtained and the situation of the regional landscape patterns was analyzed.Aimed at some alternate designs of Heishanxia hydroelectric development along the Yellow River

the impacts of each alternate design's implementation to regional landscape patterns were studied.Compared with other alternate designs of Heishanxia hydroelectric development

it was found that the design of series of power stations may be the best one.The study shows that if the design is put in practice

little changes will occur with respect to diversity

homogeneity and ecological risk index of the regional landscape

and little influence will cause on primary regional landscape patterns.Thus

the characters and functions of the primary ecosystem in the area will be kept well.