• 제목/요약/키워드: wind erosion equation (WEQ)

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An overview of applicability of WEQ, RWEQ, and WEPS models for prediction of wind erosion in lands

  • Seo, Il Whan;Lim, Chul Soon;Yang, Jae Eui;Lee, Sang Pil;Lee, Dong Sung;Jung, Hyun Gyu;Lee, Kyo Suk;Chung, Doug Young
    • 농업과학연구
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    • 제47권2호
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    • pp.381-394
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    • 2020
  • Accelerated soil wind erosion still remains to date to cause severe economic and environmental impacts. Revised and updated models to quantitatively evaluate wind induced soil erosion have been made for specific factors in the wind erosion equation (WEQ) framework. Because of increasing quantities of accumulated data, the WEQ, the revised wind erosion equation (RWEQ), the wind erosion prediction system (WEPS), and other soil wind erosion models have been established. These soil wind erosion models provide essential knowledge about where and when wind erosion occurs although naturally, they are less accurate than the field-scale. The WEQ was a good empirical model for comparing the effects of various management practices on potential erosion before the RWEQ and the WEPS showed more realistic estimates of erosion using easily measured local soil and climatic variables as inputs. The significant relationship between the observed and predicted transport capacity and soil loss makes the RWEQ a suitable tool for a large scale prediction of the wind erosion potential. WEPS developed to replace the empirical WEQ can calculate soil loss on a daily basis, provide capability to handle nonuniform areas, and obtain predictions for specific areas of interest. However, the challenge of precisely estimating wind erosion at a specific regional scale still remains to date.

새만금 간척지에서의 풍식예측에 관하여 (Wind Erodibility of the Saemangeum Tideland Reclamation Project Area)

  • 정영상;주진호;권석철;임정남;신명호;최강원
    • 한국토양비료학회지
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    • 제37권4호
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    • pp.207-211
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    • 2004
  • 새만금 간척지에서 풍식 가능성을 알아보기 위하여 풍식 예측 공식에 의해 기후 인자와 토양 인자를 평가하져다. 군산 지방의 기후 자료로부터 풍식 예측을 위한 풍식 기후 인자 C 값이 계산되었고. 풍식 토양 인자 I 값은 새만금 간척지 현장에서 채취된 108개 토양 시료의 분석 자료로부터 계산되었다. 크기 0.84 mm 이상의 비침식성 입단률로부터 계산된 I 값은 평균 $204Mg\;ha^{-1}\;yr^{-1}$로 50.08에서 $642.37Mg\;ha^{-1}\;yr^{-1}$의 범위를 보였다. 풍식 기후 인자 C 값은 3.67로 평가되었다. 기후 인자와 토양 인자로부터 산출된 연간 풍식 가능량은 평균 $7.49Mg\;ha^{-1}\;yr^{-1}$로 1.84에서 $23.57Mg\;Mg\;ha^{-1}\;yr^{-1}$의 범위를 보였으며, 풍식이 쉬운 사토에서 집중적인 풍식 방지 대책이 요구된다.