Soil erosion assessment in terrace land using WOCAT SLM (sustainable land management) method a case study in selopamioro upland and Sultan ground, Imogiri Sub Distric, Bantul Regency, Special Province of Yogyakarta

WINARNA, Nugraha Wahyu, Dr. H.A. Sudibyakto, M.S

2009 | Tesis | S2 Geo-Information for Spatial Planning and Risk M

The Sultan Ground at Selopamioro village is located in the hilly area with complex physical characteristics. Soil erosion became a problem when this area was opened in the end 1800s. Land use changing is the main factor to the accelerating of soil erosion process. It is also supported by poor physical characteristics such as steep slope and moderate rainfall intensity. Local people have their own perception about soil erosion phenomena at the study area. The perception is influenced by socio-economic characteristic of people to fulfill the daily needs. In the past, government applied top down system in developing area that did not involve local people from the beginning. Some projects were failed because of it. Therefore, government and local community should have same perception as the main input in the process of project planning, developing and implementing to reach the sustainable land management in future. This research tries to find the soil erosion factors both in physical, socioeconomic. Physical characteristic analysis is generated by field observation, secondary data and aerial photograph interpretation. WOCAT questionnaire is used as the basic question for socio-economic characteristic analysis. There are 50 respondents interviewed using this questionnaire. The respondents include member of farmer association, village staff and field supervisor. Physical and socio-economic characteristics are analyzed and used as key indicator to assess the soil erosion. The information about strategy and policy for combating soil erosion in the past done by local community and government are also discussed in this research. The result of this research shows that soil erosion process is not only influenced by physical factor, but local socio-economic characteristic also have big role. Generally, the soil erosion process started when people starting their activity in land management. Population growth causes the need of space and increase daily need. The contribution of socio economic characteristic to the soil erosion is equal to the physical factors. The socio-economic characteristic is deal with the people capacity to against the soil erosion process. For example, lower educational level; it is influencing to the receiving of new approach and technology in combating erosion. Low income of farmer causes lack of funding to implement the new technology. Lack of skill and funding causes farmers manage the land based on what they know and what they can do. Strategies and policies for combating soil erosion are discussed in this research. All of that are addressed to reduce the impact of soil erosion. However, all strategy and policy cannot give the benefit if there are no integrated perception between local community and government. It is proven by some failed project in the past. Potency of land conservation technique is also discussed in order to give recommendation to the people and government for the future developing.

Kata Kunci : Yogyakarta,Sultan ground,Selopamioro,Soil erosion,Community perception,Participatory studies,Risk perception