林內사면에서의 根系흡수모델 = A Model of Root Water Uptake in a Forested Slope

다국어 초록 (Multilingual Abstract)

Root water uptake is a main source of transpiration in a densely forested slope as subsurface flow mostly occurs in a unsaturated condition.
Considering soil-plant-atmosphere continuum concept, a sink term was introduced, defined by soil depth, root distribution and soil moisture content, to combine with a physically based model in a unsaturated soil mass. And it was used to explain the root uptake using a finite differential method and tested with a sequential field data.
The sink term represented root and vertical soil water distribution and as the soil moisture decreased, the unsaturated conductivity also decreased and it meant the available root density did not reflect a real root density, but the root uptake was designed to reflect the effective distribution of root density.
Calculated soil water tension was well fitted to the observed data through the physically based model. However, a dried zone could not be explained around the 100 cm soil depth after a dry season. In spite of the relatively small number of roots found deep in the soil under forest stands the soil was often dried to the extremly dry condition.

목차 (Table of Contents)

• 서론
• 재료 및 방법
• 1.조사지역과 방법
• 2.모델의 기술
• 결과 및 고찰
• 1.年間 水收支
• 2.토양수분과 수분장력의 관계
• 3.토양 수분 장력의 시계열 변화
• 4.근계의 흡수력
• 5.근계흡수 모델의 검정
• 적요
• 인용문헌