Snow-melting infiltration simulation system and unsaturated infiltration coefficient determination method

Abstract

The invention relates to a snow-melting infiltration simulation system and an unsaturated infiltration coefficient determination method. The simulation system comprises a bottom component, one or more serially-connected soil-column experimental standard components connected to the bottom component and a snow-melting infiltration simulation apparatus arranged on the top of the soil-column experimental standard component; simulation system soil loading components are a plurality of standard components and are automatically controlled by a computer; based on the system, the determination of a to-be-molten snow-melting infiltration coefficient and an unsaturated infiltration coefficient of four forms is realized, when in determination, a large-diameter original-shape soil column is used for performing the indoor experiment, and test steps and a calculation method are provided; the snow-melting infiltration simulation apparatus realizes a snow-melting low-temperature infiltration simulation process by virtue of a temperature regulation element and a cold-hot integrated metal element; the snow-melting infiltration simulation system has the characteristics of high practicability, good application effect and convenience in popularization and application.

Description

technical field [0001] The invention belongs to the technical field of unsaturated soil, in particular to a snowmelt infiltration simulation system and a method for measuring unsaturated permeability coefficient. Background technique [0002] Precipitation mainly refers to rainfall and snowfall. Moisture reaches the ground from the atmosphere in various forms. Other forms of precipitation include dew, frost, hail, etc. Precipitation is an important part of the hydrological cycle and the basic source of water for human beings. Precipitation data is the basis for analyzing reasonable flood and drought conditions and basin drought conditions, and is also the basis for the planning, design, management and application of water resources development and utilization, such as flood control, power generation, irrigation, etc. The process of precipitation infiltration to recharge groundwater is one of the most basic links in the "three waters" mutual conversion relationship from atmo...

AI Technical Summary

Problems solved by technology

No matter what kind of soil column is used for the test, there are still the following problems: ① The length of the single section of the soil-loading component in the soil column experiment is large, and the convenience is poor, so that the installation of the soil column is difficult, which causes inconvenience to the cleaning of the instrument; ② The installation of monitoring equipment is cumbersome and requires Drill holes in the soil column to destroy its structure; ③The monitoring equipment is generally manual observation, which makes the experiment accuracy low and artificial

[0006] CN103344538A discloses a multifunctional permeameter for unsaturated soil and its testing method. The water replenishing device is a Martens bottle, and the Marble bottle includes a water replenishing bottle whose upper and lower parts are sealed and a water replenishing bottle inserted vertically from top to bottom. Conduit, the water inlet is opened on the upper side wall of the water replenishment bottle, and the exhaust port and the water supply port are opened on the bottom side wall of the water replenishment bottle. This patent can only perform simple precipitation infiltration simulation. For more complex snowmelt simulation This patent cannot be realized nor does it give such a revelation

[0007] CN105181531A discloses an indoor simulation system for water migration of loess and a method for measuring characteristic parameters. Its rainfall simulation system includes a rainfall trough embedded in the top of the indoor simulation system box and a circular rainfall hole arranged at the bottom of the rainfall trough. The rainfall The top of the tank is provided with a pressure control pipe in the rainfall tank and a water inlet pipe connected to an external water source. The water inlet pipe is provided with a water inlet solenoid valve, a water inlet pump and a first flow sensor for real-time detection of rainfall. Pressure control solenoid valve and pressure sensor are arranged on the pressure control pipe in the described rain trough, the end of the pressure control pipe in the described rain trough is connected with an air compressor, the top inner wall of the described rain trough is provided with a The water level sensor for real-time detection of the water level, the diameter of the rain hole is 0.5mm ~ 1mm; this patent can only simulate precipitation infiltration, and this patent cannot realize the simulation of snow melting

[0008] CN103604734A discloses an unsaturated soil rainwater infiltration simulation system with controllable rain intensity. The equipment realized by the controllable rain intensity is as follows: the water supply water tank is provided with a water supply pump, and the water supply pump connects the overflow water with a water supply pipe. tank, the overflow water tank is connected to the water supply tank with an overflow pipe, and a raindrop generator is also connected to the bottom of the overflow water tank, and the raindrop generator includes several conduits communicating with the bottom of the overflow water tank. A regulating valve is arranged on the conduit, and a needle is arranged on the top of the conduit, and the needle is fixed on the fixed plate, and a funnel is arranged on the lower surface of the fixed plate, and the outlet of the funnel is located above the opening on the top of the model box. This patent It can only realize the controllable infiltration simulation of rain intensity during rainfall, and this patent cannot realize the simulation of snow melting

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