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NTIS 바로가기한국지역지리학회지 = Journal of the Korean Association of Regional Geographers, v.22 no.3, 2016년, pp.681 - 702
Two different modelling approaches to dune dynamics have been established thus far; continuous models that emphasize the precise representation of wind field, and feedback-based models that focus on the interactions between dunes, rather than aerodynamics. Though feedback-based models have proven th...
핵심어 | 질문 | 논문에서 추출한 답변 |
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되먹임 기반 모형은 어떤 관점에서 사구를 이해하는 방법인가? | ‘되먹임 기반’ 모형은 지형발달이 지형형성기구의 일방적인 작용에 의한 것이 아니라 지형과 외력의 상호작용, 지형 내부 구성요소 간의 상호작용 등에 의해 지배된다는 점을 중시하는 접근법에 토대를 둔 것이다(Coco and Murray, 2007). 되먹임 기반 격자형 모형을 이용하여 사구 지형역학을 이해하고자 하는 접근은 사구가 바람, 지형, 식생간 상호작용의 산물이라는 데 착안한다. | |
풍성사구란? | 풍성사구(風成砂丘, Aeolian Dunes)1)는 흔히 바람에 의해 형성되는 지형이라고 설명하지만 보다 정확히 말하면 바람과 지표 기복, 식생 간의 상호작용에 의해 발달・유지되는 지표상의 패턴이다 (Baas, 2007; Kocurek et al., 2010). | |
되먹임 기반 모형인 모래판 모형, 'Nishimori 모형', 'de Castro 모형을 비교하여 호환 가능성을 분석한 결과는? | 주요 결과는 다음과 같다. 첫째, 모래이동 플럭스의 관점에서 모래판 모형과 de Castro 모형은 호환이 용이하지만 Nishimori 모형은 조정인자를 고려해야 한다. 둘째, 사면조정에 관한 Nishimori 모형의 알고리듬은 다른 모형이 채택하고 있는 안식각 기준을 손쉽게 이식할 수 있다. 셋째, 모래판 모형과 de Castro 모형이 채택하는 바람그늘 규칙은 사구 성장 및 발달에 필수 요인은 아닐 수 있으며, 사구열 수준의 상호작용에서 보다 중요한 역할을 할 것으로 보인다. 모래판 모형과 de Castro 모형, Nishimori 모형은 대체로 호환 가능한 구조를 갖추고 있다고 판단되나 호환 가능성의 수준을 판단하려면 보다 체계적인 검토가 필요하다. |
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