Terrain attributes derived from digital elevation models have been used widely for mapping soil organic matter (SOM). Among these attributes, the topographic wetness index (TWI), an index for quantitatively indicating the balance between water accumulation and drainage conditions at the local scale, has been shown to correlate with SOM. However, TWIs used in most studies are calculated using a ...

OBJECTIVE To explore the relationships between different lifestyle-behavioral factors and phlegm-wetness type of Traditional Chinese Medicine constitution, so as to provide health management strategies for phlegm-wetness constitution. METHODS A case-control study was conducted with the cases selected from the database of Chinese constitution survey in 9 provinces or municipalities of China. 1...

Riparian forest buffers can improve stream water quality, provided they intercept and remove contaminants from surface runoff and/or shallow groundwater. Soils, topography, hydrology, and surficial geology detemine the capability of forest buffers to intercept and treat these flows. This paper describes landscape analysis techniques for identifying and mapping locations where forest buffers can...

Mapping landscape variation in tree species richness (SR) is essential to the long term management and conservation of forest ecosystems. The current study examines the prospect of mapping field assessments of SR in a high-elevation, deciduous forest in northern Iran as a function of 16 biophysical variables representative of the area's unique physiography, including topography and coastal plac...

"Microscopic leaf wetness" means minute amounts of persistent liquid water on leaf surfaces which are invisible to the naked eye. The water is mainly maintained by transpired water vapor condensing onto the leaf surface and to attached leaf surface particles. With an estimated average thickness of less than 1 μm, microscopic leaf wetness is about two orders of magnitude thinner than morning dew...

Flash floods have been blamed for significant losses and destruction all around the world are widely, including Vietnam, a developing nation that has particularly hard hit by climate change. Therefore, flash flood hazards essential reducing risks. The topographic wetness index (TWI), altitude, slope, aspect, rainfall, land cover, normalized difference vegetation (NDVI), distances to rivers road...

Unmanned aerial vehicles (UAVs) and light detection ranging (LiDAR) can be used to analyze the geomorphic features in complex plateau mountains. Accordingly, a UAV–LiDAR system was adopted this study acquire images lidar point-cloud dataset annular structure of Lufeng, Yunnan. A three-dimensional (3D) model constructed based on from motion multi-view stereo (SfM–MVS) combination with high-resol...

One important step in binary modeling of environmental problems is the generation absence-datasets that are traditionally generated by random sampling and can undermine quality outputs. To solve this problem, study develops Absence Point Generation (APG) toolbox which a Python-based ArcGIS for automated construction geospatial studies. The APG employs frequency ratio analysis four commonly used...