37 results about "Snowmelt" patented technology

A sorptive-filtration system for removing at least one of negatively or positively charged ions, complexes or particulates from an aqueous stream. The system includes a) flow formed substantially from at least one of rainfall-runoff or snowmelt-runoff; b) a filter containment communicating with the runoff stream such that at least part of the stream passes through the filter containment; and c) a granular filter media disposed within the filter containment, the filter media having an amphoteric material applied thereto, wherein the amphoteric material comprises a metal selected from at least one of Fe, Al, Mn, or Si.

The invention provides an asphalt pavement crack pouring process and a pavement crack repair agent. The process is mainly characterized by adopting a composite structure repair mode of bonding a composite fiber cloth on the upper surface of a repair agent layer. The used repair agent is prepared from the following raw materials in percentage by mass: 65-90% of substrate asphalt, 3-10% of modifying agent, 3-20% of solvent oil and 1-5% of plasticizing agent. The process is applicable to the crack repair of an asphalt pavement at (-16)-15 DEG C in autumn and winter, reduces the damage of snowmelt to the pavement in winter, prolongs the service life of the pavement, improves the pavement quality and lowers the maintenance cost.

The invention discloses a prediction method and device of the day runoff volume of a snowmelt period. The method comprises the steps that the variable data and the measuring parameter data of an n day snowmelt zone drainage basin in the current snowmelt period are obtained; the water-recession coefficient kn + 1 of an n + 1 day snowmelt zone drainage basin in the current snowmelt period is obtained; according to the variable data and the measuring parameter data of the n day snowmelt zone drainage basin and the water-recession coefficient kn + 1 of an n + 1 day snowmelt zone drainage basin, the water amount of snowmelt and rainfall in a drainage basin area A of the n + 1 day snowmelt zone drainage basin and the water-recession flow of river channel runoff in the drainage basin are computed; and the water amount of snowmelt and rainfall in the drainage basin area A of the n + 1 day snowmelt zone drainage basin and the water-recession flow of the river channel runoff in the drainage basin are combined, and the day runoff volume of the n + 1 day snowmelt zone drainage basin in the current snowmelt period is obtained by computing. According to the method and the device, the accuracy and the integrity of prediction of the day runoff volume of the snowmelt period can be improved.

The invention discloses a measuring and calculating method for water conserving and storing capacity of a drainage basin based on soil freeze-thawing. The method comprises the following steps: firstly, processing basic data; secondly, calculating the soil freeze-thawing hydrothermal state in the drainage basin, so as to obtain the proportion of ice content in the soil; then, quantitatively expressing the temporal distribution of the water conserving and storing capacity at various grid points in the drainage basin, and calculating the grid-type soil water conserving and storing capacity index; finally, calculating the water conserving and storing capacity at grid points in a sub-basin of each stage, drawing discretized cumulative distribution curves of the water conserving and storing capacity in all the sub-basins so as to obtain a dynamic measuring and calculating model of the water conserving and storing capacity of soil in the drainage basin of a freeze-thawed area, and measuring and calculating the water conserving and storing capacity of the drainage basin during the soil freeze-thawing. According to the invention, a numerical model is built for a point-scale melted snow-frozen soil hydro-thermal coupling system, and establishes relationship with the water conserving and storing capacity of soil in drainage basin grids, so that the water conserving and storing capacity index of the drainage basin at spatial scale is set dynamically to coincide with the actual situation, and errors caused by the homogenization of a cold region drainage basin are reduced.

The invention relates to a snowmelt agent, which is a composite snowmelt agent and comprises the following components and contents (weight) in percentage by weight: 80 to 95 percent of acetate and 5 to 20 percent of chloride. Compared with the prior art, the snowmelt agent has good snow removing effect and low chloride content, can reduce the corrosivity of the snowmelt agent obviously, effectively protects pavement and bridges, prolongs the service life of public facilities and reduces the cost while achieving excellent snow removing effect.

The invention discloses a snow removing and melting machine, belonging to the technical field of mechanical engineering relating to mechanical equipment for removing road snow. The task of the invention is to provide the snow removing and melting machine. The technical scheme is as follows: the snow removing and melting machine comprises a vehicle cab (2), wherein a snow accumulating device (1) is arranged at the lower position of the front end of the vehicle cab (2); and a heating and heat insulating device (3) and an open-type water gathering tank (14) are arranged at the upper position of a beam steel structure (201) on the back end of the vehicle cab (2). When the machine removes the accumulated snow, the drained accumulated snowmelt cannot give rise to a molten ice river on the road surface and new potential safety hazards for pedestrians and vehicles; and the snowmelt cannot damage plants and trees on the roadsides and seedlings in the fields so as to protect the environment; meanwhile, the use cost is lower.

The invention discloses a method for observing preferential flows in arid and semi-arid alpine regions, which belongs to a technical measure for researching forest hydrology processes, water resources and sloping-field runoff characteristics. In a technique and a method for observing preferential flow observing fields in arid and semi-arid alpine regions disclosed by the invention, according to the theories of forest ecology and forest hydrology, the occurrence regularity and development regularity of snowmelt runoffs are observed and studied, and through observation, research and analysis, the change rule of preferential flows under the conditions of different weather conditions, different forest vegetations, different forest coverage rates, different manual acting modes and different slope positions and directions is revealed, thereby finding effective ways of increasing the flow rate of preferential flows, developing and rationally utilizing water resources, making up the flow rate of river channels in dry seasons, relieving the contradiction of water utilization for spring ploughing in the middle and lower reaches of rivers, and solving practical problems which are badly required to be solved in current agricultural production.

The invention relates to an environment-friendly snowmelt agent which comprises the raw materials by weight percentage: 60 to 80 of tetrahydrate calcium nitrate, 8 to 15 of monohydrate calcium acetate, 4 to 7 of tetrahydrate magnesium acetate, 1 to 4 of potassium nitrate, 4 to 8 of potassium acetate, 2.5 to 5 of monoammonium phosphate and 0.5 to 1 of anticaking agent. The invention is harmless to the growth of plants, such as flowers, grasses, trees and crops, does not pollute fishes, does not damage the growth of the fishes, does not erode steel and fully achieves the snowmelt and environmental-protection requirements.

The invention relates to a snowmelt long-term efficacy testing method of a snowmelt asphalt mixture. The method comprises the steps of using a snowmelt asphalt mixture as an experimental group, using a common snowmelt asphalt mixture without a snowmelt additive as a blank group, using the snowmelt additive as a reference group in an experiment, respectively putting the mixtures and the additive into water, testing electrical conductivity at regular time intervals, performing calculation to obtain the snowmelt long-term efficacy time of the snowmelt asphalt mixture when the electrical conductivity in the snowmelt additive reaches a maximum value. By means of the snowmelt long-term efficacy testing method of the snowmelt asphalt mixture, test data are accurate and reliable, the timeliness of ice and snow melting effect on the snowmelt asphalt road surface in actual engineering can be predicted through an indoor test, and the testing method is used for indoor evaluation on snowmelt long-term efficacy of the snowmelt asphalt mixture.

The invention discloses an arid and semiarid region alpine snowmelt runoff observation method. The observation method comprises the following steps: selecting a snowmelt runoff observation field; determining the construction place of the snowmelt runoff observation field; and constructing the snowmelt runoff observation field and a measuring cabin. According to the theories of the forest ecology and the forest hydrology, the generation and development rules of the snowmelt runoff are observed and researched, and the change rules of the snowmelt runoff under different meteorological conditions, different forest covers, different forest coverage rates and different artificial action modes are disclosed through observation, research and analysis, so the find-out of an effective way for increasing the flow of the snowmelt runoff, making up the flow of a river way in a dry season and alleviating the spring ploughing water conflicts along the middle and lower reaches is needed to solve an urgent practical problem in the current agricultural production.

Methods and systems for estimating a surface runoff based on a pixel scale are disclosed. In some embodiments, the method includes the following steps: (1) calculating a vegetation canopy interception water storage, a litterfall interception water storage, and a soil water storage according to an obtained original remote sensing dataset of a climate element in a study area; (2) calculating a vegetation-soil interception water conservation in the study area based on an established vegetation-soil interception water conservation estimation model according to the vegetation canopy interception water storage, the litterfall interception water storage, the soil water storage, and monthly precipitation; and (3) calculating a surface runoff in the study area based on an established water balance water conservation estimation model according to the monthly precipitation, monthly snowmelt, monthly actual evapotranspiration, and the vegetation-soil interception water conservation in the study area.

A method for identify that start date of snowmelt runoff in northeast China is disclosed, It can reasonably estimate the start date of spring snowmelt runoff, provide a basis for the construction of reliable and suitable snowmelt runoff forecasting model, and further scientifically and reasonably formulate reservoir operation scheme, which can not only ensure the demand of agricultural water supply and shipping water, but also reserve storage capacity for the later flood control, and realize the efficient development and utilization of water resources. The method comprises the following steps:(1) dividing the snowmelt runoff of a watershed; (2) identification of the start date of snowmelt runoff in the watershed; (3) Regularity calibration of snowmelt runoff start date in the watershed.

The invention relates to the field of rainwater control and rainwater utilization and discloses an ecological tree pool with a floator controlling an abandoned flow of initial rainwater automaticallyand a working method. The ecological tree pool comprises the floator, an abandoned flow drainage ditch and a water distribution area, wherein a flow inlet is formed in one end of the abandoned flow drainage ditch while the other end of the abandoned flow drainage ditch communicates to a drainage pipe, a first through hole matched with the floator is formed in the bottom surface of the abandoned flow drainage ditch, a detention storage space is arranged in the water distribution area below the abandoned flow drainage ditch, the floator is arranged in the detention storage space, the floator canmove up and down in the first through hole, and the upper surface of the floator is aligned to the bottom surface of the abandoned flow drainage ditch or is higher than the bottom surface of the abandoned flow drainage ditch. According to the working method of the ecological tree pool, automatic flow abandonment is achieved based on the floator, and the floator can reset automatically after rainfall, so that manual operations are not needed, and the flow is abandoned efficiently. Problems that initial runoff pollutants may lead to blockage in operation of the tree pool and damage arbor plantsand snowmelt runoff affects operation of a facility and the like are solved effectively.

At present, in some countries and regions in the world, the method of scattering snowmelt agent is adapted for preventing the urban road icing when it is snow in winter. The advanced technology is bought back in Beijing with a large value. However, practices prove the technology is not scientific. According to the medium report, 9000t snowmelt agent is used for two big snows in 2002.12.18 to 2002.12.23 and 2003.1.21 to 2003.1.22 and the cost is near 9 million yuans. Road periphery and water are polluted seriously and several ten thousands of woods in green region are dead. According to existing problem of prior method and the condition that there are 2.8 million vehicles in Beijing and 30 thousand ton oils are consumed every day, the invention is that residual heat generated by many vehicles and consumption oil is used to melt ice and snow on the road; there is only need to add a siphon on the vent-pipe of vehicle so as to jet drainage gas downwards. For regions and areas where there are not many vehicles entering, melting ice machine can be adapted. Jetting flame generated by liquefied petroleum gas or diesel is used to melt ice and snow quickly.

The invention relates to a preparation method of an environment-friendly organic composite salt snowmelt agent. According to the method, humic acid is compounded with sodium ions to form a humic acid associated complex, i.e. the organic composite salt snowmelt agent causing low corrosion to carbon steel and rubber is formed. The snowmelt agent has the advantages of low corrosion, low freezing point and good snow melting effect, and effectively solves the problems of salt damage to vegetation, water pollution and soil hardening. In addition, the snowmelt agent has an anti-skidding effect for the road. The selected materials for preparing the snowmelt agent are commercially available products which are low in price and easy to obtain, so that the snowmelt agent provided by the invention is suitable for industrial application.

The invention discloses a roof tile made of a fireproof ceramic material, which is obtained through the following steps: kneading defatted rice bran from rice bran and a thermosetting resin, and preliminarily baking the obtained mixture in an inert atmosphere at 700-1000° C. The block is crushed into carbonized powder, and then the carbonized powder is kneaded with a ceramic material powder, a solvent, and an optional binder to obtain a plastic mixture (ceramic material-solvent mixture), and the mixture has a pressure of 10-100 MPa. Press forming, and the obtained briquettes are heat-treated again in an inert atmosphere at 500-1400°C.

The invention discloses a snowmelt splashing device for highway maintenance, including a truck, holding bracket, conveyor box, stirring tank, agitator motor, rotating shaft, turntable, air deflector,control panel and lid. The truck is secured to a fixed frame at the carriage, and a storage box is fixed on the top of the fixing bracket, and a lid of the storage tank is connected to the top of thestorage tank through a hinge, and a transport box is fixed at the bottom of the storage box, and the conveying box is communicated with the storage box, and a conveyor motor is fixed at one end of theconveyor box close to the truck head, and a snowmelt splashing device for highway maintenance can automatically sprinkle snow melting agent through a machine, liberate manpower, reduce cost, uniformly sprinkle, has high efficiency, and can prevent blockage of agglomerated snow melting agent by a machine, and is convenient for people to use.

The invention belongs to the field of field observation of snowmelt runoff simulation, and particularly relates to a snow cover temperature observation system. According to the system, a plurality of temperature sensors which are high in sensitivity, resistant to low temperatures and low in power consumption are fixed on a composite board, the composite board is connected with a supporting frame, and the supporting frame is fixed on a ground cement base. The snow cover temperature observation system solves the difficult problem of temperature observation in different snow depths in plateau areas, achieves real-time dynamic observation of snow cover temperatures in different depths in a long sequence, improves the precision of parameter calibration in a snowmelt runoff simulation model, and greatly reduces the expenditure of scientific research funds.

Methods and systems for estimating a groundwater recharge based on a pixel scale are disclosed. In some embodiments, a method includes the following steps: (1) obtaining an original remote sensing dataset of a climate element in a study area and a pixel area of the study area; (2) calculating a total water resource yield in the study area by a water balance equation according to the original remote sensing dataset of the climate element and the pixel area of the study area; and (3) estimating the groundwater recharge in the study area according to the total water resource yield and the monthly runoff in the study area. The original remote sensing dataset of the climate element includes monthly precipitation per unit pixel area, monthly actual evapotranspiration per unit pixel area, monthly snowmelt per unit pixel area, monthly soil moisture change per unit pixel area, and monthly runoff.

The invention relates to the roof accumulated snow removing technology, in particular to a roof energy-saving automatic melted snow collecting system. The roof energy-saving automatic melted snow collecting system solves the problems that an existing roof accumulated snow removing device is low in snow removing efficiency, poor in work reliability, poor in environmental protection property and low in automation degree. The roof energy-saving automatic melted snow collecting system comprises a main house portion, a roof snow removing portion, a melt water collecting portion and a sensory control portion. The roof snow removing portion comprises a first rail, a second rail, a first bearing seat, a second bearing seat, a third bearing seat, a fourth bearing seat, a first pulley shaft, a second pulley shaft, a first fixed pulley, a second fixed pulley, a third fixed pulley, a fourth fixed pulley, a first steel wire rope ring, a second steel wire rope ring, a snow removing brush, a first idler wheel, a second idler wheel, a two-way motor, a pinion, a large gear and a mica heating board. The roof energy-saving automatic melted snow collecting system is suitable for houses with plane roofs or roofs close to planes and with the snow removing brush convenient to install.

A snow melting vehicle is used for sweeping accumulated snow on a road and comprises a snow collecting device, a snow melting device and a water storage tank which are installed on a motor vehicle, wherein a snow collecting port of the snow collecting device is located in the front end of the motor vehicle, a snow discharging port of the snow collecting device is communicated with a snow inlet of the snow melting device, a water outlet of the snow melting device is communicated with a water inlet formed in the top of the water storage tank, and a draining valve is arranged at the lower portion of the water storage tank. The snow collecting device delivers the snow on the road into the snow melting device, and the snow melting device melts solid snow into water to be delivered into the water storage tank, water is discharged into an urban sewer in a centralized mode after the water storage tank is full of water. The snow melting vehicle can sweep accumulated snow on roads, is good in sweeping effect, high in efficiency, free of snow accumulation and capable of saving time and labor.

The invention discloses a prediction method and device of the day runoff volume of a snowmelt period. The method comprises the steps that the variable data and the measuring parameter data of an n day snowmelt zone drainage basin in the current snowmelt period are obtained; the water-recession coefficient kn + 1 of an n + 1 day snowmelt zone drainage basin in the current snowmelt period is obtained; according to the variable data and the measuring parameter data of the n day snowmelt zone drainage basin and the water-recession coefficient kn + 1 of an n + 1 day snowmelt zone drainage basin, the water amount of snowmelt and rainfall in a drainage basin area A of the n + 1 day snowmelt zone drainage basin and the water-recession flow of river channel runoff in the drainage basin are computed; and the water amount of snowmelt and rainfall in the drainage basin area A of the n + 1 day snowmelt zone drainage basin and the water-recession flow of the river channel runoff in the drainage basin are combined, and the day runoff volume of the n + 1 day snowmelt zone drainage basin in the current snowmelt period is obtained by computing. According to the method and the device, the accuracy and the integrity of prediction of the day runoff volume of the snowmelt period can be improved.

The invention relates to an environment-friendly snowmelt agent which comprises the raw materials by weight percentage: 60 to 80 of tetrahydrate calcium nitrate, 8 to 15 of monohydrate calcium acetate, 4 to 7 of tetrahydrate magnesium acetate, 1 to 4 of potassium nitrate, 4 to 8 of potassium acetate, 2.5 to 5 of diammonium hydrogen phosphate and 0.5 to 1 of anticaking agent. The invention is harmless to the growth of plants, such as flowers, grasses, trees and crops, does not pollute fishes, does not damage the growth of the fishes, does not erode steel and fully achieves the snowmelt and environmental-protection requirements.