This posting would explain the geoenvironment situation of geotracking activity from Indonesia Student Association in Miyagi (PPIS – Perhimpunan Pelajar Indonesia Sendai).
Omoshiroyama situated on 454 meters above sea level (masl) and Yamadera on about 400 masl. The tracking route is not too difficult but quite narrow and steep-slippery. It is go down about 6.8 km from Omoshiroyama to Yamadera.
Mountains around the tracking area is active volcano, and vulnerable area for earthquake that could trigger landslide. We could find much of igneous rock in this route. The river is filled by cooled-magma from about 5 or 6 million years ago.
We had through Yamagata Perfecture Nature Reserve, consist of subtropical forest with high biodiversity (flora and fauna- especially bird and mammals).
It was a very beautiful place for learning geology, river geomorphology, and geographical situation in this nature field. I will be back in the near future, to take more information about this area.
Yamadera temple photo: courtesy Asep Ridwan
From the figure below we can see that geotracking route is located in the down stream, watershed area. if the rain is fall, majority of water will flow into this river along the geotracking route. From this figure we can analyze that this nature reserve is water resource for inhabitants in Yamagata prefecture. Yamagata prefecture local government already established good environmental protection program for this reason.