搜索结果: 16-30 共查到“知识库 土壤地理学”相关记录184条 . 查询时间(0.453 秒)
Pedogenesis on volcanic rocks in protected landscape areas in Central and North Bohemia
andesite basalt Bw horizon dolerite mineral compostion main pedogenic process
2015/3/10
The development of soil cover on volcanic rocks in Central and North Bohemia was analyzed. The study was performed in the protected landscape areas on basalt, andesite, and dolerite. Parent material w...
Relating extent of colluvial soils to topographic derivatives and soil variables in a Luvisol sub-catchment, Central Bohemia, Czech Republic
digital elevation model digital soil mapping loess soil erosion soil organic carbon
2015/3/10
Colluvial soils, resulting from accelerated soil erosion, represent a significant part of the soil cover pattern in agricultural landscapes. Their specific terrain position makes it possible to map th...
Assessing sediment enrichment ratio in Mai-Negus catchment, northern Ethiopia
degradation erosion-status sites landform
2015/3/10
Soil degradation is a threat to sustainable development in Ethiopia. However, degradation indicators, such as sediment enrichment ratio (SER), are not adequately documented in literature. This study a...
Investigation of polluted alluvial soils by magnetic susceptibility methods: a case study of the Litavka River
environmental magnetism Fluvisols magnetite/maghemite risk elements
2015/3/9
Serious pollution of alluvial soils by a wide range of potentially toxic elements is usually observed in the valleys with mining and metallurgical industry. To outline areas of increased risk elements...
The impact of vegetation on the bank erosion (Case study: The Haraz River)
GIS hydraulic behaviour HEC-RA roughne coefficient
2015/3/9
Vegetation establishment is a suitable biological method of erosion control. Bank erosion is one form of water erosion and its adverse effects include an increase in turbidity, degradation of riverban...
Mapping the topsoil pH and humus quality of forest soils in the North Bohemian Jizerské hory Mts. region with ordinary, universal, and regression kriging: cross-validation comparison
Black Triangle digital soil mapping geostatistics map accuracy
2015/3/9
North Bohemia belongs to one of the most heavily industrialized and polluted regions in Europe. The enormous acid deposition which culminated in the 1970s has largely contributed to the accelerated ac...
Use of trace elements from historical mining for alluvial sediment dating
archaeological methods heavy metals historic metallurgy human impact landscape development Middle Ages
2015/3/9
We examined whether it is possible to relate concentrations of trace elements in alluvial sediments with records concerning the intensity of mining, and use them as a means of dating. We conducted our...
Assessment of trace and heavy metal distribution by four sequential extraction procedures in a contaminated soil
fractionation metals mining activities pollution
2015/3/9
Four sequential extraction procedures (Sposito, Tessier, Silveira and Bureau Communautaire de Reference (BCR)) were used to evaluate the distribution of some metals (Fe, Cu, Cd and Zn) in a contaminat...
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...