• 한국물환경학회지
• /
• 제26권6호
• /
• pp.910-918
• /
• 2010

In recent years, riparian buffer system has been known as one of the effective best management practices. However, establishment of riparian buffer system in aspect of plant species and its position in the riparian buffer zone has not been investigated due to lack of efficient evaluation method for the analysis of water quality improvement with established riparian buffer system. To solve this problem, the SWAT-REMM prototype was developed by the researchers in Canada. But, SWAT-REMM model can not consider the $NO_3-N$ load into riparian buffer system through subsurface flow. Thus to solved this problem, Fortran code of SWAT-REMM model was modified. This modified SWAT-REMM system was applied to the Bonggok watershed. Three riparian buffer scenarios, 15 m, 10 m, 5 m width for tree and grass, were made to evaluate the effects of riparian buffer system on water quality improvement. Reduction efficiency of T-N by riparian buffer system of 15 m wide was the greatest (6 ~ 37%, depending on subwatershed characteristics) among 3 scenarios. It indicates that the reduction efficiency of T-N load has increasing-tendency, as buffer width increasing. The results obtained from the analysis showed that wide buffer zones are found to be more effective in reducing non-point pollutant than narrow buffer zones in the riparian buffer zone system. Hence, the SWAT-REMM model could be efficiently used for evaluation and design the most effective riparian buffer systems to reduce pollutant loads to the watershed although many limitations still exist in SWAT-REMM model.

• 한국방재학회 논문집
• /
• 제8권4호
• /
• pp.111-118
• /
• 2008

수변완충지대는 토지로부터 나오는 오염물질의 하천으로 직접유입을 차단하고 저감하는 역할을 한다. 하지만 현재까지 수변완충지대 설정에 따른 유역에서의 저감효과를 분석하는 사례는 부족한 실정이다. 본 연구에서는 SWAT모형을 이용하여 Arcview GIS상에 병성천 유역 모형을 구축하고 SWAT모형에서의 filter strip기능을 이용하여 수변완충지대 설정에 따른 토사 유출량의 변화를 살펴보았다. 모의결과 저감효과가 큰 곳을 살펴보면 대체적으로 토사유출량 관측지점인 유역 출구지점과 가까운 소유역에서 저감효과가 큰 것으로 보였다. 또한 수변완충지대의 폭을 달리하여 시나리오 분석을 수행한 결과 5-10 m의 수변완충지대 폭이 그 저감효율이 가장 큰 것으로 보였다.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
• /
• pp.436-440
• /
• 2006

Diffuse pollution has been considering as a major source of the quality deterioration of water resources. The establishment of riparian vegetation strips of buffers along those areas of water bodies is used to reduce the threat of diffuse pollution. Remote sensing offers a means by which critical areas could be identified, so that subsequent action toward the establishment of riparian zones can be taken. Even though the principal purpose of this research comes from the feasibility of the imagery of KOMPSAT-2 satellite, Landsat TM satellite data, which has 7 bands, are used to characterize the land cover for the study area on the behalf of KOMPSAT-2. This investigation focuses on the assessment of the existing riparian buffer zones for a portion of the upper Geum river watershed from the viewpoint of pollution mitigation by riparian vegetation strip establishment. Through comparing the delineation of riparian buffer zones developed with the existing zones established by the government, we can find the critical distortion points of the existing riparian buffer zone.

• 한국물환경학회지
• /
• 제20권6호
• /
• pp.555-562
• /
• 2004

This paper presents the development and application of a riparian buffer zone design model(RBZDM). The model was developed as a decision-making tool for watershed management, by integrating geographic information system(GIS) and analytical hierarchy process(AHP) theory. Several factors for watershed management, such as pollution removal capacity, land aquisition cost, distribution of point and non-point pollution sources, and possibility of new pollution source location, were analyzed based on AHP theory. The vegetated buffer zone width was designed using GIS-based riparian buffer analysis. The developed model was applied to the Kyoungan Stream watershed, which is an important part of Paldang lake catchment area. The Kyoungan stream watershed was divided into sixteen subbasins. Six of them belong to the main stem, where the model was applied. Ten alternatives of buffer zone width and five hierarchial levels were designed. The relative importance and the relative preference were computed by pair-wise comparison of evaluation criteria given in hierarchial levels. The buffer zone width was determined by linear function of the given alternatives and relative preferences. From this study, it was determined that the six buffer zone widths of Kyoungan main stems would be 1,594, 1,744, 1,856, 1,782, 1,338, 1,780 meter, from upstream to downstream.

• 대한원격탐사학회지
• /
• 제22권5호
• /
• pp.445-449
• /
• 2006

Diffuse pollution has been considering as a major source of the quality deterioration of water resources. The establishment of riparian vegetation strips or buffers along those areas of water bodies is used to reduce the threat of diffuse pollution. Remote sensing offers a means by which critical areas could be identified, so that subsequent action toward the establishment of riparian zones can be taken. On the behalf of KOMPSAT-2 satellite imagery as a high resolution spatial data, Landsat TM satellite data are used to aquire the land cover for the riparian buffers studied. This investigation aims to assess the riparian buffers established on the upper Geum river as a pollution mitigation. Through comparing the delineation of riparian buffer zones developed with the existing zones established by the government, we can find the critical distortion points of the existing riparian buffer zone.

• 한국물환경학회지
• /
• 제31권2호
• /
• pp.166-180
• /
• 2015

Pollutant in watersheds comes from two major sources which are NPS (nonpoint source pollution) and PS (point source pollution). Most of the pollutant can be treated by wastewater treatment plants. However, wastewater treatment plants may not be an appropriate practice to improve water quality for the watersheds with large portion of NPS pollutant and NPS pollution from direct runoff and baseflow has different characteristics. Therefore the practices to improve water quality need to be comprehensive for pollutants by both direct runoff and baseflow. Riparian buffer, one of practices to manage pollutant in watershed, has been applied to reduce pollutant not only from direct runoff but also baseflow. In this study, the scenarios for pollutant reduction by wastewater treat plants and the nitrogen reduction by riparian buffer were simulated using SWAT-REMM to suggest an effective plan for pollutant reduction from baseflow. Riparian buffer provided nitrogen reduction of 0.2~75.0% in YbB watershed and 38.0~47.0% in GbA watershed. The result indicates that riparian buffer is effective to reduce the pollutant especially from baseflow, and it suggested as suitable for the a watershed which WWTP discharge is not capable to reduce enough pollutant.

• 환경영향평가
• /
• 제21권6호
• /
• pp.903-916
• /
• 2012

We need to use aesthetic landscape assessment(ALA) as the means of riparian buffer zone(RBZ) management. This study verified the political validity of designation policy of RBZ and land purchase policy. The purpose of this study was to propose RBZ landscape management strategies through ALA of RBZ in Gyeongan Stream for the better attractive and healthy riparian landscapes. The natural type landscape units(LUs) covered 40.9% of the entire area and the cultivated land type LUs covered 20.58%. Landscape assessment consisted of landscape quality and landscape integration assessment. The criteria for assessing landscape quality(LQ) were naturalness, interest, uniqueness, and landscape function. LQ was ranked into five grades using a matrix. The landscape integration assessment consisted of an inner integration assessment in each LU and outer integration assessment among LUs. To review the propriety of designating the riparian area and the riparian ecological belt, differences in ecological appraisal and aesthetic valuation were reviewed through a t-test, Oneway ANOVA, and logistic analysis. The results of ALA, 29.15% of the entire area scored at grade 1 in LQ, while 31.95% scored at grade 5, indicating that grade 5 areas occupied a high share. Surveyed areas were divided into designated RBZ and undesignated RBZ. Results indicated that designated RBZ scored grade 1 in LQ took up 33.2% of the total, significantly higher than the 23.3% taken up by undesignated RBZ. When examined according to buffer distance, grade 1 areas within 50m took up 50.2% of the total area, lower than the 32.7% at buffer distances of 500m-1km. Results indicated a 1% statistically significant difference. Accordingly, analysis was undertaken for the expansion of designation of the riparian area and the selection of appropriate land for formation of a riparian ecological belt, and was designated at priority 1 and 2 for land purchase. This study can also contribute to the formation of a riverine eco-belt through discovery of design factors for upgrading the ecology, aesthetics, and landscape of the riparian area and application in determining land purchase priorities.

• 환경영향평가
• /
• 제17권1호
• /
• pp.1-9
• /
• 2008

Non-point pollution is caused by many diffusive sources, unlike a point pollution derived from industrial wastewater treatment plants or sewage treatment plants. Runoff of non-point pollutants is originated from rainfall or thawing in short period of time moving over and through the a ground surface. They cause ill effect on the quality of neighboring aquatic environment. To prevent effectively the wash off from non-point pollutant, it should be immediately reduced at the source or be treated after gathering of runoff water. This study has been carried out for the best width of riparian buffer zone. So we implemented the experiment in terms of its depth, width and kind of vegetations and calculated the reduction of pollutants loading. The experimental zone encompasses the watershed of Namhan River (Kyunggido Yangpyunggun Byungsanri). The region was divided into 5 land cover sectors : grass, reed, pussy willow, mixed(grass+pussy willow) and natural zone to compare effectiveness of vegetation. Water samples from four points have been collected in different depths. And the pollutant removal efficiency by sectors with different plant species was yielded through influent with one of each sample. And we obtained the correlation between the width of riparian buffer zone and the removal efficiency of pollutants. Using correlation result, the width of riparian buffer zones which needs to improve the water quality of river could be derived.

• 대한환경공학회지
• /
• 제32권11호
• /
• pp.1030-1037
• /
• 2010

본 연구에서는 비점오염물질 관리를 위한 적정 수변완충폭의 산정 방안과 산정된 수변완충지역에 식재되는 식생 유형에 따른 탄소 축적 효과를 비교하여 수변지역을 친환경적으로 관리하기 위한 방안을 제시하였다. 낙동강 중.하류지역인 낙본 K 유역을 대상으로 수행한 연구 결과 대상 하천에 30~600 m 범위의 수변 폭이 필요한 것으로 분석되었으며, 산출된 수변완충지대 조성 지역에서 논, 밭, 초지, 나대지 등 수변 조성이 용이한 지역은 총 1,776.51 ha로 산출된 지역의 약 50%로 나타났다. 조성이 용이한 1776.51 ha에 활엽수림으로 수변완충지역을 조성할 경우 약 14,526 ton, 혼효림으로 조성할 경우 11,826 ton, 침엽수림으로 조성할 경우 8,382 ton, 다년생 초지로 조성할 경우에는 3,349 ton의 탄소가 각각 매년 축적되는 것으로 나타났다. 본 연구의 결과 산정된 수변완충지역에 매년 흡수하는 이산화탄소량은 자동차 약 5천대에서 배출되는 이산화탄소량과 비슷하며, 4인 기준 가정 약 2만 가구에서 나오는 이산화탄소량과 유사한 양으로 파악되었다.

• 한국지리정보학회지
• /
• 제8권2호
• /
• pp.157-165
• /
• 2005

본 연구의 목적은 금호강 유역을 대상으로 수변구역의 토지이용패턴과 하천 수질간의 관계를 규명하는 것이다. GIS 자료는 수치토지이용도(1:25,000), 수치지형도(1:5,000)에서 추출된 하천망도, 그리고 다중버퍼링 기법에 의한 수변구역도로 구성되었다. Pearson의 상관분석은 하천 양안 30m 수변구역의 토지이용패턴과 수질간의 관계를 설명하기 위해서 사용하였다. 수변구역의 토지이용패턴을 분석한 결과에 따르면, 대구광역시가 위치하고 있는 금호강 하류의 소유역들은 대부분이 주거, 상업, 공업의 도시지역으로 개발된 반면, 금호강 중류와 낙동강 본류에 분포하는 소유역들은 논, 밭 그리고 과수원 등의 농업지역으로 주로 이용되었다. 유역에서 발생되는 질소, 인, 퇴적물 등의 여과기능을 담당할 수 있는 산림지역의 면적률은 16% 정도에 불과한 것으로 나타났다. 수변구역의 토지이용패턴과 하천 수질지표간의 상관분석결과에 따르면, 수변구역의 도시면적률은 하천 수질과 음(-)의 관계를 가지며, 산림지역 면적률은 양(+)의 상관관계를 가지는 것으로 나타났다. 향후에는 지가 등의 경제적인 측면을 비롯한 현재의 토지이용패턴, 그리고 하천 제방의 특성, 지형, 토양 등의 물리적 인자를 종합적으로 고려한 조사 및 연구와 이를 바탕으로 한 종합적인 수변구역 정비 및 관리계획이 수립되어야 할 것으로 판단된다.