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토지이용 변화지역의 토양재조사 결과 분석

Study on Soil Survey Results of Rapid Change in Landuse

  • 현병근 (국립농업과학원 토양비료과) ;
  • 손연규 (국립농업과학원 토양비료과) ;
  • 박찬원 (국립농업과학원 토양비료과) ;
  • 송관철 (국립농업과학원 토양비료과) ;
  • 전현정 (국립농업과학원 토양비료과) ;
  • 홍석영 (국립농업과학원 토양비료과) ;
  • 문용희 (국립농업과학원 토양비료과) ;
  • 노대철 (국립농업과학원 토양비료과) ;
  • 정소영 (국립농업과학원 토양비료과)
  • 투고 : 2012.06.01
  • 심사 : 2012.07.13
  • 발행 : 2012.08.31

초록

최근 농경지의 급격한 감소와 더불어 도시화, 경지정리, 도로공사 및 혁신도시 건설 등으로 토지이용의 변화가 심하게 발생되고 있다. 특히, 토지이용 변화심화지역인 경기도 고양시, 충청남도 천안시, 강원도 원주시를 대상으로 토지 이용변화실태, 토양특성변화양상, 토양도수정내용 및 기업도시 등으로 편입되는 지역의 토양환경분석을 하였다. 이에 대한 결과를 요약하면 다음과 같다. 1. 우리나라의 경지면적 (2011년)은 2009년대비 17.3 ha가 감소되었다. 논의 경우 24.2 ha가 감소되었으나, 밭의 경우에는 7.0 ha가 증가하였다. 2. 논의 면적 감소사유로는 논밭전환 (20.7 ha) > 공공시설 (3.2) ${\geq}$ 건물건축 (3.2) > 유휴지 (1.3) > 기타 (0.9) 순이며, 밭 면적의 증가원인은 논밭전환 (20.7 ha) > 개간 (4.5) > 복구 (0.3) 순이었다. 논밭전환의 이유는 논농사에서 농가소득이 높은 밭작물 내지 시설작물로 전환하는 것으로 생각된다. 3. 토지이용변화가 심한 해당시군의 농경지감소 (논, 밭, 과수)는 밭토양조사 (1995~1999) 당시와 비교 (2011년)할 때 고양시는 1,466 ha, 천안시 9,708, 원주시 6,980 ha가 감소되었으며, 1999년 대비 45%~25%의 농경지가 급격히 감소되었다. 4. 환경부 토지이용피복도의 통계자료 활용성을 검토하기 위해 농식품부 통계자료와 비교시 지목별로 큰 차이가 있었다. 따라서, 추후 면밀한 검토를 통하여 활용 방안을 마련해야 할 것이다. 5. 원주시의 토양정보 변경내용을 보면 곡간지의 일부 논토양이 밭 또는 과수원으로 토지이용이 변경되었으며, 배수등급의 경우 도로건설 등으로 인해 저습화되는 등 해당 토양의 일부 특성정보가 변경되었다. 특히, 논토양의 경우 시설재배지, 밭, 과수원, 휴경, 성토화 등으로 토지 이용의 변화가 심하였다. 6. 원주시 혁신도시에 편입되는 논토양은 급지가 떨어지는 3~4급지가 대부분으로 3급지 70.8%, 4급지 29.2%이었다. 밭토양 역시 4급지가 88.7%인 토양으로 우량 급지가 혁신도시 건설에 속하지는 않았다. 앞으로 우량농경지 보전을 위해 제도적 장치의 마련이 필요하다고 생각한다.

Recently, agricultural lands decrease sharply, which was caused by urbanization, land consolidation, road construction, and innovation city construction, etc. In particular, Goyang, Chenan and Wonju city were had severe land use change. Therefore, we analyzed changes of land use, soil properties, and soil information in order to provide the basic soil information and soil management practice in these cities. The results are summarized as follows. The area of crop cultivated land in Korea (2011) was reduced to 17.3ha compared to ones from the previous year (2009). The paddy field decreased by 24.2 ha but, upland field increased by 7.0 ha. The reasons for the reduction of the paddy field were converting paddy field to upland (20.7 ha) > public facilities (3.2) ${\geq}$ building (3.2) > idle land (1.3) > and others (0.9). Other reasons for reduction in the upland field were switching upland to paddy field, (20.7 ha) > land developed (4.5) > and restoration (0.3) respectively. The main reason of converting paddy field to upland was changing from rice to more profitable upland or greenhouse crops. The cropland area (paddy fields, upland, orchard) of Goyang, Cheonan, and Wonju city were reduced to 1,466 ha, 9,708 ha and 6,980 ha respectively. The ratio of cropland area in each city was reduced by 45~25% dramatically compared to upland soil survey project in Korea (1995~1999). These data were compared with MiFAFF statistics data to use for land use cover map of Ministry of environment. But they were differences significantly. Therefore, intensive investigation should be advised throughout the utilization plan. The paddy fields located in small valley in Wonju city were changed into upland or orchard. The drainage classes of soil have been deteriorated because the flows of water were intercepted by road construction and other disturbance to water flows. In particular, paddy fields have been changed to not only upland, orchard, greenhouse cultivation but also to fallow and soil dressing on paddy in Wonju city. The soil suitability classes of paddy field in Wonju innovation city were the 3rd grade for 70.8% of the area and the 4th grade for 29.2%. The soil suitability classes of upland was the 4th grade for 88.7% of the area. Fortunately, good soil suitability classes were not belong to innovation city in Wonju. So, the good farm land should be conserved and revise the related law.

키워드

참고문헌

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