De- 
a are 
opo- 
d SP 
Point 
dam. 
m SP 
igital 
ed by 
- GIS 
ct the 
-Sec- 
igital 
> Fig- 
1 Was 
OM). 
:alcu- 
Le 
  
OSS- 
  
  
  
Figure 6 shows the final results for simulated 
soil saving dam. In this case four soil saving dams 
are needed to prevent debris flow and landslide 
in the watershed. Left side in the Figure 6 shows 
the watershed, flow of river and place of soil sav- 
ing dams.The right in the Figure 6 shows the 
cross-section of four soil saving dams which were 
simulated by developed system. 
Characteristics of developed system is using 
50m mesh digital elevation data instead of detail 
conture map. Huge amount of money and work 
need to design soil saving dam in the past. Be- 
cause it is difficult to consider environment 
around planning areas. Developed system will 
assist the planning of soil saving dam. 
We have already been conducted the analysis 
in the valley areas with remote sensing data and 
thematic map data respectively. We especially fo- 
cused the landslide in the mountainous areas on 
recent years. If we can combine satellite image 
data to developed system, simulated accuracy will 
improve. 
6. CONCLUSIONS 
We have been conducted the estimation of land- 
slide in the pilot area located north district of 
Noto Peninsula in the central district of Japan. 
The first objective of this study is to find areas 
where landslide may occur in the near future at 
valley areas by using satellite remote sensing data 
and thematic map data related to landslide areas 
with GIS (Geographic Information system) tech- 
niques. 
In this paper our purpose focused to evaluate 
the place where the soil saving dam will con- 
tract in valley. We reached first objection to esti- 
mate the number and the place of soil saving dam. 
We need more investigation and simulation. We 
will investigate the relationship between simula- 
tion results and actual soil saving dam at differ- 
ent place for evaluation of environment. 
ACKNOWLEDGMENTS 
The authors wish to thank a student of gradu- 
ate , Mr.Yoshihiko Suzuki (He works at ASIA 
AIR SURVEY Co,.LTD now) contributed sig- 
nificantly to the computation and investigation 
for this analysis. We also wish to acknowledge 
the INFOMATIX INC. and Pasco CORPORA- 
TION for their assistance in analyzing the data. 
References 
[1] Y.Noguchi, 1969 SABO Engineering, 
Asakura Book Company Co,.LTD. 
[2] Japan Society of Civil Engineering, 1980 
SABO,Landslide and Dangerous areas for 
steep Slope, GHIHOUDO Book Company 
Co, LTD. 
[3] ESRI, 1991. 
ARC/INFO Command References 
[4] M.Shikada, T. Kusaka and K Miyakita, 1992. 
Extraction of Landslide areas Using MSS 
Data and Thematic Map DatabaseSystem, 
International Archives of Photogrammetry 
and Remote Sensing, Vol.16. Part B4 
Com.4,pp.386- 391. 
[5] T.Kusaka, M.Shikada and Y.Kawata, 1992. 
Extraction of Landslide Areas Using Spatial 
Features of Topographic Basins,Proc.of 
IGARSS' 92. 
[6] A. Takei, 1993 SABO Engineering, 
BUNEIDO Co,.LTD. 
[7] T.Kusaka and M.Shikada, 1993. 
Inference of Land-slide Areas Using Spatial 
Features and Surface Temperature of Water- 
sheds, SPIE Int.Sympo. on Optical Eng. and 
Photonics Aerospace and Remote Sensing, 
pp241-246. 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXII, Part 7, Budapest, 1998 613