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.

这项研究的结果如下。1）在实验盆地的森林观察塔上，通过气象数据分析，日本雪松人工森林的蒸散季节变化和ehime县中的cypress。日本雪松森林的三年贯穿和茎流的观察数据导致了可以对截距蒸发机理进行建模的地步。3）至于人造森林的径流特征与从阔叶林中的径流特征之间的差异，它变成了土壤的清晰含水性能，森林的蒸散差异是原因。4）为了使NDVI与蒸散量之间的关系清晰明了，在观察塔和NDVI的季节性变化中观察到了NDVI的局部NDVI。分析了卫星数据。结果，发现日本雪松和人造森林的柏树的NDVI季节性变化以及蒸散的季节性变化并不相似。而且不可能找到蒸发义和NDVI价值之间的关系。另一方面，在落叶森林相关性的测试区域被认识到NDVI的蒸散和季节性变化。5）为评估水资源操纵而开发了简单的树型模型，并用于分析顶篷截距。结果表明，可以通过顶篷存储量评估森林处理与截距蒸发的关系。如果可以将该模型应用于大型森林流域，则将使用该模型作为评估森林管理效果的模型将非常有效。