The habitat characteristics of Torreya were investigated based on high resolution DEM and remote sensing image. The distribution of Torreya was mapped by visual interpretation of IKONOS image. The landform and PCA analysis results showed that curvature, altitude, aspect and slope were found to be the dominant features controlling spatial distribution pattern of Torreya. A certain degree moistur...

In much of the world, large scale soil maps which would better inform land use decisions are not available. The major impediment to collection of large scale data is the cost of field survey over large areas. One promising approach to increase the efficiency of soil survey is soil-landscape modelling. Soil-landscape models formalise relationships between soil attributes and other environmental ...

ミャンマーにあるシッタン川の河口には，典型的なロート状の平面形状をもつ潮汐卓越型のエスチュアリーが発達し，大潮の際にはタイダルボアが形成される。本研究では，流れ，土砂輸送および地形の相互関係に着目し，シッタン川のエスチュアリーにおける数十年規模の地形変化のメカニズムを明らかにした。現地調査と，地形図および衛星写真の時系列分析によれば，シッタン川の主流路は少なくとも過去100年の間変動しており，20年程度の周期で右岸と左岸に河岸線の前進と後退を交互にもたらしている。このような周期性は，侵食に伴う滑らかな河岸線の発達と，州の付加および排水路の形成に伴う鋸状の河岸線の発達，および村落分布の変化から説明される。河岸侵食のおもな営力はタイダルボアとそれに続く上げ潮の流れであり，これらが河岸下部を侵食して河岸上部の土塊を崩落させることで河岸線は著しく後退し，土砂はエスチュアリーへと供給されている...

The topographical morphology of the loess landform on Loess Plateau exhibits remarkable textural features at different spatial scales. However, existing topographic texture analysis studies are usually dominated by statistical characteristics and missing structural characteristics. At same time, there is a lack regularity calculation methods for DEM digital terrain analysis. Taking as study are...

The trade-offs and synergies reveal the profit loss relationship between ecosystem services, which is of great significance to sustainable development natural resources. services in Jiangxi Province, such as net primary productivity (NPP), soil conservation (SC) water yield (WY) during 2000–2020, were estimated this study. correlation coefficient was adopted analyze three by static space dynami...