Evaluation of water management using satellite remote sensing and hydrological approach in forest

利用卫星遥感和水文方法评估森林水管理

• 批准号: 14360087
• 负责人: EBISU Nobuhiro
• 金额: $ 9.6万
• 依托单位: Ehime University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14360087/
• 关键词: Sesonal variation of NDVI; Canopy interception; Tank model; Canopy storage; Tree form model; Intercept evaporation; water management; Comparison of basin; 樹冠遮断タンクモデル; NDVI; 蒸発と蒸散; 樹冠遮断現象; 樹冠遮断蒸発モデル; ボーエン比法; 航空写真画像のオルソ化; 森林試験流域; 森林気象観測タワー /

The result of this research is as follows.1)With meteorological data analysis at the forest observation tower of the experimental basin, seasonal variation of the evapotranspiration of the artificial forest of the Japanese cedar and cypress in Ehime prefecture became clear.2)Analysis of the observation data for 3 years of the throughfall and stemflow at the Japanese cedar forest led to the point where the mechanism of intercept evaporation can be modeled.3)As for the difference between runoff characteristic from the artificial forest and that from the broadleaf tree forest, it became clear water holding property of the soil and the difference of evapotranspiration from forest are the causes.4)In order to make the relationship between NDVI and the evapotranspiration clear, local NDVI observed at the observation tower and seasonal variation of the NDVI by the satellite data were analyzed. As a result, it was found that the seasonal variation of NDVI of the Japanese cedar and cypress of the artificial forest and seasonal variation of the evapotranspiration were not similar. And it was not possible to find the relationship between the evapotarsnpiration and NDVI value. On the other hand, at the test area of the deciduous forest correlation was recognized bewteen the evapotranspiration and seasonal variation of the NDVI.5)To appraise the water resource manegement the simple tree form model was developed and used for analyzing canopy intercept. The result indicates that relationship of the handling of the forest with intercept evaporation can be evaluated by the canopy storage quantity. If it is possible to apply this model to large forest watersheds, it will be considerably effective to use the model as the one which appraises the forest management effect.

研究结果如下：1）通过对试验流域森林观测塔气象资料的分析，爱媛县日本杉柏人工林蒸散量的季节变化变得明显。通过对日本杉林3年穿透雨和树干茎流观测资料的分析，得出了截留蒸发的机理可以3）人工林径流特征与阔叶林径流特征的差异主要是由于土壤的持水特性和森林蒸散量的差异造成的。4）为了明确植被指数与蒸散量的关系，分析了观测塔观测到的本地植被指数（NDVI）和卫星数据的季节变化。结果表明，人工林中日本杉、柏植被指数的季节变化与蒸散量的季节变化并不相似。蒸散量与植被指数之间的相关性不明显。另一方面，在试验区的落叶林中，蒸散量与NDVI季节变化之间存在相关性。5）为评价水资源管理，建立了简单的树形模型，并用于冠层截留分析。结果表明，林冠贮水量可以用来评价林分的处理与截留蒸发量的关系。如果该模型能应用于大流域森林经营效果评价，将是一种有效的森林经营效果评价模型。