Recently, the population growth and urbanization of the suburban area have been progressing in city in the middle and lower of Huanghe valley. To achieve sustainable city development, overall land use and natural environment control are required. In this research, a new method (Normalized Difference Vegetation Index in Built-up Area: NB) to measure indicator of vegetation activity is developed to evaluate the remaining green tract and the vegetation distribution in built-up area. The NB value is calculated by land use agglomeration (C Index) and NDVI. As a result, the vegetation distribution in built-up area and the situation of urbanization are evaluated overall in the object area.

The purpose of this study is to estimate land coverage change and the characteristic of urbanization in city agglomeration in the middle and lower of Yellow River valley using Landsat data and the survey data of land use condition. Firstly, we created the maps of the land coverage classification, and found the actual situation of the land coverage. Secondly, we investigated the change of the built-up area by the Kernel Density Presumption method, and analyzed the effect from traffic infrastructure, maked the characteristic of the urbanization clear. Finally, we analyzed the change of NDVI and concluded the characteristic of the urbanization in the city agglomeration.