This study presents the development of a suitable numerical method for porous media flow with free and moving boundary (Stefan) problems arising in systems with wetted and unwetted regions of porous media. A non-singular version of the method of fundamental solutions (MFS), termed the boundary distributed source method (BDS), is applied. Darcy flow and homogenous isotropic porous media is assumed. The solution is represented in terms of the fundamental solution of the Laplace equation in two-dimensional Cartesian coordinates. The desingularisation is achieved through boundary distributed sources of the fundamental solution and indirect calculation of the derivatives of the fundamental solution. Respectively, the artificial boundary, characteristic for the classical, singular MFS is not present. The novel BDS is compared with the MFS and the analytical solutions for several numerical examples with excellent agreement. A sensitivity study of the solution, regarding the discretization and the free parameters is performed. The main contributions of the study are the application of the BDS to free and moving boundary problems and the comparison of BDS with MFS for these types of problems. The developed model can be applied to various geohydrological problems.
COBISS.SI-ID: 2412539
Bioaerosols are an important element of the cave air and along with other parameters give a precise insight into atmoshperic conditions and responses to climate change. Multidisciplinary study revealed that with natural air inflow high concentrations of biological and inanimate particles are introduced in the underground. Sedimentation of airborne allochthonous material probably represent one of important and continuous source of organic carbon for cave fauna.
COBISS.SI-ID: 34079277
Electrical resistivity imaging is a widely used tool in geophysical surveys for investigation of various subsurface structures. To assess its applicability for subsurface karst, electrical resistivity imaging was conducted in the southeastern part of the karst plateau above DivasŽka jama and its sediment-filled denuded continuation on the surface. Cave passages that are not filled with sediment were not detected with electrical resistivity imaging, because the electrical resistivity difference between voids and highly resistive carbonate bedrock is small. On the other hand, denuded caves and cave sections that are filled with loamy material can be clearly distinguished from less resistive carbonate bedrock.
COBISS.SI-ID: 50741090
The study included survey of surface karst features and microscopic analyses of rock samples in the area of the new airport location in Kunming, China, accompanied with hydrogeological studies and microbiological analyses of two karst drinking water sources in its vicinity. The results of the study pointed to the necessity of taking immediate measures for the springs’ protection and show the importance of interdisciplinary research when planning anthropogenic activities in karst.
COBISS.SI-ID: 34280749
A good knowledge of the natural and cultural heritage of karst is a precondition for the rational planning of life on it. The karst can be known and understood primarily through the comprehensive study of its surface, caves, waters, and ecological characteristics. The Karst Research Institute ZRC SAZU has been involved in developing this basic knowledge, establishing interdisciplinary connections among the most important fields of karstology, and consolidating them into an integral science of karstology for more than six decades. We try to organize the knowledge to make it as useful as possible for planning life in karst regions and are directly involved in larger major projects. This book collection will present a selection of completed and new projects. The first book in the series contains selected directly applicable research studies on karst waters, their use for supplying and their protection. The second book contains selected studies on different projects from construction on karst to its protection.
COBISS.SI-ID: 259195648