Geodiversity And Geoconservation An assessment of the karst Atlas v.2 found that the natural karst geomorphic system (based on simplified lithological karst types) that has been the least http://soer.justice.tas.gov.au/2003/lan/2/issue/77/ataglance.php
Extractions: State of the Environment Tasmania Home Chapters Report contents Land Index of chapters Geodiversity and Geoconservation Index of Land issues Issues Condition Threatening Processes At a glance The issue Geodiversity is the natural diversity of geological, landform and soil features, and processes. Geoconservation is 'the conservation of geodiversity for its intrinsic, ecological and (geo)heritage values' ( Eberhard 1997 ). Geoconservation is complementary to biological conservation ('bioconservation') in that it seeks to conserve the non-living aspects of the natural environment, as an integral part of a balanced approach to nature conservation. The geoconservation values of significant phenomena can be degraded by human-activities that either change the significant and valuable features of a site, or that change the natural processes controlling the continuing development of the feature. This 'At a glance' section provides an overview of the issue of geodiversity and geoconservation. More detailed information and references are available in the
Extractions: The early evolution of karst aquifers depends on a manifold of initial and boundary conditions such as geological setting, hydrologic properties of the initial aquifer, and petrologic properties of the rock. When all water entering at various inputs into the aquifer has equal chemical composition with respect to the system H early evolution under conditions of constant head exhibits breakthrough (BT) behaviour. If the chemical compositions of the input waters are different, deep in the aquifer where the saturated solutions mix renewed aggressiveness occurs, and additional dissolutional widening of fractures by mixing corrosion (MC) changes the hydrologic properties of the aquifer. To study the impact of MC on the evolution of karst we have modelled a simple karst aquifer consisting of a confined limestone bed, with two symmetrically located inputs at constant head and open flow conditions along the entire width at base level. To calculate dissolutional widening of the fractures the well-known dissolution kinetics of limestone was used, which is linear up to 90% of saturation with respect to calcite and then switches to a nonlinear fourth order rate law. First, two extremes are modelled: (a) Both inputs receive aggressive water of equal chemical composition with [Ca
