The history of slope land development in Japan is closely related to the industrial makeup of the area and the economic trends at the time of development. On the other hand, does the monetary value of land（land prices）account for the risk of natural disasters? Research into land rent theory, a subject that has mainly been examined in classical economics, sometimes examines land rent in terms of differences in the fertility of land for agricultural purposes. When considering the “utility” of real estate in real estate appraisal standards in the present age, it is necessary to reflect the value inherent to the physical properties of land, including safety for habitation, agricultural productivity, and cultivation management of farmland, in terms of “utility”, and to use suitable land for residential purposes. In the current social environment, it is difficult for the value of land to be reflected correctly unless regulations are strengthened.

There are two types of landmass transportation concerning the artificial landform changes. One is the diffusive transport and the other is concentrative one of the excavated materials. The rate of transport is compared with that of natural geomorphic process, using the mathematical model describing the landform change. The simplest solution of the model coinciding the diffusion equation with drift（transport）term can be a measure to evaluate the rate of transport with diffusion and the reverse concentration. Rate for both artificial landform changes compared with the natural process evokes the problems especially in the diffusive reclaiming and constructive concentration by the compaction and the subsurface stress increase by overburden concerning the earthquake occurrence.

Using the laser data borrowed from the Geospatial Information Authority of Japan, we investigated the landform changes of dikes and high water channels downstream of the Kinu River. Areas with the unique elevation changes could be interpreted from the striped pattern in the surplus maps created from the value of elevation change. Based on the shape of the striped pattern, relative elevation change and land use information, artificial modification of bank slope, sediment movement due to flood, deformation of the entire river bank, and some deformation on bank crest and bank slope were estimated in these change areas. Furthermore, we confirmed that new construction of a road connecting to the bank crest, development of slightly high land and shallow valley in the high water channels, and tilting and sinking of a part of road due to undergrounding work occurred at these change areas. It was also pointed out that the unique elevation change may indicate the widening of the crest, the process of bulging and collapse of the slope, and the influence of weeding.

Even if the old and new laser data have different accuracies and point cloud densities, it is easy to interpret landform changes on various spatial scales from meaningful elevation changes occurring in artificial modified lands such as dikes and high water channels by using surplus maps.