|
|
Pedotransfer functions for estimation of moisture retention curves of medium-heavy soils of South Moravia
Gavlasová, Iva ; Doležal, Petr (referee) ; Kameníčková, Ivana (advisor)
The most important characteristics of each soil is its hydro-physical properties, which include retention curve. Retention curve expresses the relationship between humidity and pressure head. It is course affected by many factors such as grain size and mineralogical composition, humus content, structure and bulk density of dry soil. This thesis deals with direct and indirect determination of one of the basic hydraulic characteristics of the soil, soil moisture retention curve. For laboratory determination of moisture retention curves were used for sand tank and pressure instruments. Measured body retention curves were optimized RETC program.For indirect determination of retention curves were used Pedotransfer function by Wösten et . al .(1998 ) , derived from the European soils and under HYPRES Šútora and Štekauerová (2000). As in the project Wösten et al . (1998), PTF were processed for arable land in the area. The accuracy of both models PTF was assessed by the correlation coefficient R and standard error RMSE. Simple models PTF provide estimates of retention curves with sufficient accuracy for practical use in the locality.
|
|
|
Analysis of selected variations of the gravity due to the mass dynamics
Volařík, Tomáš ; Lederer,, Martin (referee) ; Vatrt, Viliam (referee) ; Mojzeš,, Marcel (referee) ; Weigel, Josef (advisor)
This dissertation is focused on a study of selected environmental effects influencing terrestrial gravity observations. Global geopotential models were used to compute quantities of the disturbing gravity field and its variations during time period. Furthermore, analyses of an atmospherical and hydrological effects on the gravity observations were provided. The computation was realized at the station Pecný, however the concept was proved and compared with data from station Strasbourg. Consequently, the results were discussed with respect to quasigeoid modelling established from gravity and astrogeodetic measurements. The result and recommendations for future research are exposed.
|
|
|
Determination of soil hydraulic characteristics in the selected location
Stoklásková, Adéla ; Doležal, Petr (referee) ; Kameníčková, Ivana (advisor)
This thesis deals with direct and indirect determination of soil hydraulic characteristics (retention curve and hydraulic conductivity) in the locality of Bohaté Málkovice. For laboratory determination of soil moisture retention curve is used sand tank and pressure relief device. For the indirect determination of soil hydraulic characteristics is used computer software Rosetta, which includes 5 models of pedotransfer functions. For estimatiton of retention curves are applied previously derived pedotransfer function (continuous parametric PTF and point PTF).
|
|
|
Hodnocení výsledků portálu intersucho.cz externími zpravodaji
Balcárková, Lucie
Bachelor thesis Evaluation of the results of intersucho.cz by external reporters analyses data from an online questionnaire available on intersucho.cz, where external reporters subjectively assess by marks whether the water balance in the soil according to the SoilClim model corresponds with reality in their region - district. The comparison of the districts was made on the basis of established criteria - for districts with more than 100 assessments per year, the objectivity coefficient is calculated by which the 4 worst- performing and the 4 best-performing districts are selected on the basis of the annual evaluation. The development of the assessment is analysed in more detail in selected districts. Based on the analyses performed, no demonstrable change in the assessment of model outputs by external reporters has been observed since the introduction of the new version of the water balance model SoilClim II. However, the overall improvement in the assessment in the previous year, 2021, which is the best-performing year since the introduction of the questionnaire investigation, is demonstrable.
|
|
|
Water regime of reclaimed and nonreclaimed heaps
Cejpek, Jiří ; Frouz, Jan (advisor) ; Kuráž, Václav (referee)
Summary: Great Podkrusnohorska spoil heaps in the Sokolov region in Western Bohemia is the largest spoil heaps in the Czech Republic, which was pour million tonnes of overburden soil surface mining of brown coal. The thesis is setting on the basic characteristics of the water regime and water balance of spoil heap soil and thus follows a series of previous works dealing with the comparative development of the reclaimed and unreclaimed area. The areas are long-term monitoring of soil moisture using a dielectric soil moisture meter total water regime was monitored by subsurface with gravitation lyzimeter, runoff and throughfall rainfall. Older unreclaimed plots as well as reclaimed plots have higher porosity, water field capacity and moistre than young sites, however there are limited by water deficiency in similatr way as young sites due to increase in wilting point. Keywords: Spoil heaps, Recultivation, Soil humidity, Water supply, Water balance
|
|
|
Variability of hydropedological characteristics in model catchments of Blanice River headwater area
Kozáková, Jana ; Kliment, Zdeněk (advisor) ; Královec, Václav (referee)
In this thesis are based on the scientific literature defined selected hydropedologic characteristics and is described their impact on motion and amount of water.in the soil and also on the runoff process. In this thesis are quoted methods that can be used for measuring motion and amount of water. Data obtained on several field campaigns and continuous measurement of soil moisture sensors Virrib was processed. Field campaign took place in catchments of Zbytinský and Tetřívčí stream, which are paired comparative experimental catchments. The continuous soil moisture was measured at three places, which differ in their vegetation and soil cover. Data Analysis was concentrate to evaluate soil moisture measured by Virrib, which were compared to soil moisture determined during field campaigns. The continuous soil moisture was measured at three places, which differ in their vegetation and soil cover. The results show that differences and similarities in the vegetation and soil cover greatly reflect on soil moisture. Subsequent comparison of two differently obtained soil moisture should show that the values obtained from Virrib are representative. But comparations of values discover, that in Virrib measurement can be found some inaccuracies. Keywords: hydropedological characteristics, runoff process,...
|
|
| |
|
|
Měření půdní vlhkosti metodou EIS a teplotní stratifikace půdy v oblastech Khan Khentii strictly protected area a Khowsgol lake v Mongolsku
Sobotka, Milan
In July 2014, the Strictly Protected Area of Khan Khentii and Lake Khowsgol in Mongolia carried out moisture and soil temperature measurements in July 2014 to determine the link between these variables and permafrost. Measurement of soil moisture was performed by EIS (electrical impedance spectrometry). A total of 146 measurements were performed and 49 soil probes were digested. It is always measured in the A and B soil horizons. Measurements up to exceptions did not exceed 30 cm in depth with respect to the content of the skeleton whose skeletal content increased. The direct relationship of permafrost to thermal stratification of soil horizons has been demonstrated. The occurrence of permafrost up to 150 cm from the first measurement was characterized by a difference in temperature between the steps of up to 2 °C. In the case of permafrost deeper, the transition between the measuring steps was smoother, on average by 0.6 °C. By measuring the soil moisture Found by the highest average soil moisture at the nearest tenth, Goricho. Abnormally high soil moisture at this site may be due to the growth of the active layer of permafrost in the primary phase of its melting in the severe anthropogenic damage to the Gorkhy-Terelch National Park landscape.
|
|
|
Vodní režim krajinného segmentu lesního porostu v podmínkách pařezinového hospodaření
Vichta, Tomáš
This diploma thesis deals with the water regime of soils of the forest landscape segment. The object of the research was the permanent study plot Ušákov with low forest (simple coppice) and high forest (abandoned simple coppices) at the Training Forest Enterprise Masaryk Forest Krtiny, Bilovice forest district. The main aim of the thesis is to evaluate the dynamics of the soil water regime during the hydrological year 2018 in this landscape segment in relation to the thinning (basal area of each polycormon was reduced to 50%) and 30% reduction of throughfall precipitation in coppice stand and also in relation to the different forest management. The results show that in the thinned coppice stands is soil moisture higher during the whole investigated season, while in the coppice stands with reduced throughfall is lower, the effect of the different forest management on the soil moisture was not conclusively proved. Another task of this thesis is also to introduce the basic outline of the methodology of how to evaluate continually and ambulatory acquired soil water regime data from any landscape segment. Based on this method, individual humidity values of the studied soils were analyzed.
|
|
|
Shade effect on the Coffea canephora diameter increment in the Mondulkiri province, Cambodia
Garcia Cano, Yessika Alejandra
Agroforestry systems with Coffee are very frequent, and, ecological benefits for the soil, water conservation, biodiversity, and quality have been well documented. It was hypothesized that shade practices might have influence on growth of C. canephora, therefore the increment of coffee shrubs and its relationship with environmental condi-tions like air humidity, temperature and soil moisture were studied. Three different Cof-fee plots in the province of Mondulkiri were selected. From the results, the statistical significance of the differences between the two main conditions, shade and full-sun was not clear, however it was assumed that other conditions besides microclimatic can have influence, like phenological stages of the coffee plant and source-sink relationships. Soil moisture remained higher under shaded conditions.
|
guest ::
