搜索结果: 76-90 共查到“土壤地理学”相关记录259条 . 查询时间(0.818 秒)
Digital soil mapping from conventional field soil observations
field soil description fuzzy k-means pedometrics regression-kriging terrain
2015/3/9
We tested the performance of a formalized digital soil mapping (DSM) approach comprising fuzzy k-means (FKM) classification and regression-kriging to produce soil type maps from a fine-scale soil obse...
Affectability of splash erosion by polyacrylamide application and rainfall intensity
marl formation polyacrylamide FEL3 rainfall simulator splash erosion
2015/3/5
Splash erosion is recognized as the first stage in a soil erosion process and results from the soil surface bombing by rain drops. At the moment when rain drops conflict with the soil surface, soil pa...
Building soil spectral library of the Czech soils for quantitative digital soil mapping
diffuse reflectance spectroscopy digital soil mapping soil spectral library
2015/3/3
Spectral libraries are the data archives of spectral signatures measured on natural and/or man-made materials. Here, the objective is to build a soil spectral library of the Czech soils (SSL-CZ). Furt...
Analysis of soil degradation in the Czech Republic: GIS approach
degradation GIS modelling soil
2015/3/2
In our work, we have evaluated the available data on the individual types of soil damage, which has been processed in the Czech Republic in recent decades. The individual types of degradation (water e...
Creating GIS on the pilot area of the Litoměřice district. From soil survey to international information systems
archive soil data soil survey (geo)statistical methods and pedotransfer rules soil GIS SOTER
2015/3/2
The procedure of processing and utilising the soil information entering the SOTER system is tested on the pilot area of the Litoměřice district. The reliability of the archive data is examined, t...
亚热带丘陵小流域土壤有效磷空间变异与淋失风险研究
亚热带丘陵小流域 土地利用 土壤磷素累积
2015/3/9
肥料过施导致的土壤磷素累积和淋失是农业面源污染的重要方面.以湖南省长沙县金井镇脱甲河小流域(52 km2)为研究区,采用高密度布点采样、ArcGIS软件和属性相似反距离加权插值法研究了亚热带丘陵小流域表层(0~20 cm)土壤有效磷(Olsen-P)含量(以P计,下同)的空间分布特征与磷素的淋失风险.结果表明,菜地、果园、稻田和茶园土壤Olsen-P 平均含量为62.0、16.1、14.4和13....
Integration of soil information systems. BIS and SOTER perspectives
soil information systems soil maps and survey BIS SOTER
2015/2/4
The article presents an overview and brief characteristics of the selected soil information systems in the Czech Republic. It suggests synchronisation of their development, particularly some convergen...
Proposal for a method for Colluvisol delineation in Chernozem region
soil erosion terrain modelling soil cover structure soil mapping
2015/2/4
Erosion, which is one of the most important exogenous processes forming the landscape, has become a main degradation factor affecting agroecosystems. One of the direct erosion effects is a change in t...
Effect of temperature on the distribution of polycyclic aromatic hydrocarbons in soil and sediment
sorption desorption thermodynamic parameters polycyclic aromatic hydrocarbons
2015/2/4
The knowledge of sorption-desorption processes of polycyclic aromatic hydrocarbons (PAHs) in natural solids is essential to predict the fate, transport, and environmental risks of these pollutants. In...
Assessing the stream water quality dynamics in connection with land use in agricultural catchments of different scales
nitrates land use drinking water reservoir basins GIS
2015/2/4
The ecological status of many surface waters in the Czech Republic is poor, mainly due to still relatively high discharges of N substances especially from agriculture. High nitrate values in the strea...
Creating of digital surface model and orthophoto from ASTER satellite data and their application in land/water research
remote sensing ASTER digital surface model orthophoto
2015/2/4
Satellite data has become a commonly used information source. Landscapes components such as water, inorganic substances, vegetation, and the atmosphere may be distinguished making use of their spectra...
The structural porosity in soil hydraulic functions – a review
soil structure bi-modal soils soil water retention unsaturated conductivity pore size distribution structural pore domain matrix pore domain
2015/2/3
Products of biological processes are the dominant factor of soil structure formation in A horizons, while in B horizons their role is less expressed. Soil structure influences dominantly the structura...
Comparison of soil maps with different scales and details belonging to the same area
detailed soil map reconnaissance soil map geographic information system
2015/2/3
Two different soil maps prepared by different institutes at scales of 1:200 000 and 1:25 000 covering identical areas were compared to determine the accuracy of reconnaissance. These soil maps are wid...
Using the sensitivity of biomass production to soil water for physiological drought evaluation
physiological drought soil water content transpiration biomass production mathematical modelling maize
2015/2/3
The analysis of drought as a phenomenon and the proposal of how to define and quantify the deficiency of water in soil for plants, so called physiological drought, are described. The presented approac...
A relationship between the verdure system and land use planning of a small town
small town verdure system functional and spatial structure
2015/1/22
Small towns are defined as towns with the population not exceeding 15,000 (20,000) residents. They are organisms that can be embraced visually, mostly with the clearly demarcated area. Residents know ...