Johan Arif
The title of this study was the mapping of the Bengawan Solo River Terrace in the West Kalitidu and Padangan District, Bojonegoro Regency, East Java. The purpose of this research was to provide an overview of the spread of sand and stone deposits (sirtu) around the Bengawan Solo Purba river, especially around the perspectiveness and pretang where in the two regions there were many sirtu excavations carried out by the local community. The excavation if not paying attention to the geological aspects can certainly cause environmental damage. By mapping it, the depiction of zoning, wherever the size of a coarse sediment starts from the sand to the lumps accumulates, can be done. It is expected that this mapping project is carried out the results can be socialized to the local community as an effort to facilitate the increase in community welfare. It is also expected that the results of this mapping will be applied later in the other place around the Bengawan Solo River where the Group C (Sirtu) community mining is there. The location of the study was in two sub-districts namely Kalitidu District and Padangan District. The geography position of the two locations is between 7� 8 '53.98 "� 7� 12' 54.68" South Latitude; 111� 43 '39 "111� 48' 32.28" East Longitude and between 7� 10 '34.27 "� 7� 14' 1.54" South Latitude; 111� 35 '56.74 "� 111� 38' 43.9" East Longitude. In this area there are several class C mining businesses, namely sand and stone (sirtu) by the local community. The sirtu is the result of sediment deposits from the Bengawan Solo Purba River which is spread in several places around the Bengawan Solo River now. The method that will be used in this study is the survey method in the field assisted by GPS. Also carried out the profile of land / sediment profiles, taking sedimentary examples for the purposes of sedimentology analysis and organic material fragment retrieval (anti-residual wood) to be analyzed by the river terrace with a carbon method 14 (C-14). The survey in the field is focused on the existence of the river terrace.
Implementation of social care activities in the form of education / counseling / mentoring
The excavation of sand and stone (sirtu) carried out by the community around the Bengawan Solo Purba river, especially in perspectives and chances, if not paying attention to geological aspects can cause environmental damage.