Patents
Literature
3 results about "Thermokarst" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Thermokarst is a land surface characterised by very irregular surfaces of marshy hollows and small hummocks formed as ice-rich permafrost thaws, that occurs in Arctic areas, and on a smaller scale in mountainous areas such as the Himalayas and the Swiss Alps. These pitted surfaces resemble those formed by solution in some karst areas of limestone, which is how they came to have karst attached to their name without the presence of any limestone. Small domes that form on the surface due to frost heaving with the onset of winter are only temporary features. They then collapse with the arrival of next summer's thaw and leave a small surface depression. Some ice lenses grow and form larger surface hummocks, which last many years and sometimes become covered with grasses and sedges, until they begin to thaw. These domed surfaces eventually collapse either annually or after longer periods and form depressions which contribute to uneven surfaces. These are included within the general label of thermokarst.
A portable sampling device for the sediment of narrow river channel in karst mountainous area
The application relates to the technical field of sampling equipment, and discloses a portable sampling device for silt in a narrow river channel in a karst mountainous area, which comprises a connecting disc, a sampling assembly and a supporting assembly. The connecting disc is provided with a mounting hole. A connecting piece is arranged in the mounting hole. The connecting piece is provided with an abutting portion which can be telescopically moved. A driving piece for driving the abutting portion to move is rotatably connected to the connecting disc. The sampling assembly passes through the mounting hole and is slidably connected with the mounting hole. The sampling assembly can be screwed with the abutting portion. The sampling assembly can slide out of the mounting hole. The supporting assembly is hingedly connected with the connecting disc, and the supporting assembly can telescopically move. Through the double design of "support folding and shrinking" and "rod disc separation", the whole device can be divided into three independent modules, namely the connecting disc (containing the driving piece), the sampling assembly and the supporting assembly. Each module can be compressed to the minimum volume and easily put into a conventional size mountaineering bag or a sampling box, so that the real portability is realized.
Owner:YUNNAN ACAD OF ENVIRONMENTAL SCI
A method and system for evaluating rainfall erosivity in karst mountainous areas
Owner:INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
A mountainous area-based flow water ecological landscape water demand calculation method
ActiveCN121981507BData processing applicationsScene recognitionSensing dataEnvironmental resource management
The application belongs to the field of data processing and water resources, and particularly relates to a water demand calculation method for a flowing water ecological landscape based on a mountainous area. The method comprises the following steps: identifying features such as karst landforms and ancient terraces through remote sensing data; constructing a nonlinear regulation and storage model of underground reservoirs to simulate the base flow lag release effect; calculating the landscape fragmentation and connectivity index, and establishing the mapping relationship between the spatial structure and the hydrological process; constructing an ecological water demand quota correction matrix based on nonlinear regression; and combining the base flow supply sequence and the dynamic landscape parameter to output the final water demand calculation result. The application realizes the deep coupling and dynamic correction of ecological water demand and spatial structure by introducing the nonlinear regulation and storage theory and the landscape pattern index, and improves the accuracy and scientificity of water demand calculation in a complex environment.
Owner:SHANDONG SURVEY & DESIGN INST OF WATER CONSERVANCY