12 results about "Lysimeter" patented technology

The invention discloses a gravity self-cleaning-based maintenance-free anti-blocking filtering device for an overflow pipe of a lysimeter, and belongs to the field of soil hydrologic monitoring equipment. Comprising a filtering mechanism, and a discharging mechanism is arranged below the filtering mechanism; the filtering mechanism comprises a shell, a funnel pipe is integrally formed at the bottom of the shell, and a top plate is rotationally connected to the upper portion of the inner side of the shell through a rotating shaft; a multi-layer filtering structure of primary filtering of the filter screen, secondary filtering of the filter cartridge and tertiary filtering of the conical filter cloth is adopted, so that large-particle impurities, fine impurities and scraps in water in the lysimeter can be intercepted step by step, and the filtering precision is high and comprehensive; when the pointed cone of the conical filter cloth faces upwards, fine impurities can be deeply filtered, chippings which are intercepted by the filter cartridge and slide down along the funnel pipe can be received and stored, the chippings are prevented from directly entering a discharging mechanism to cause blockage, the blockage risk of a discharging channel is reduced from the source, and smooth evaporation and infiltration drainage is guaranteed.

The utility model relates to the technical field of soil moisture monitoring, and discloses an underground lysimeter device which comprises a cultivation box arranged in a basement, the cultivation box is a cylinder with an upper opening, the top of the cultivation box extends out of the ground and is communicated with the outside, soil is arranged in the cultivation box, and crops are planted in the soil. A drainage cylinder communicated with an inner cavity of the cultivation box is arranged at the bottom of one side of the cultivation box, a drainage channel for draining water to the drainage cylinder is arranged at the bottom of the cultivation box, and a drainage pipe is arranged at the bottom of the drainage cylinder and connected with a drainage pump. A drip irrigation pipe is arranged at the upper opening of the cultivation box and is connected with a water inlet valve; the water inlet valve and the draining pump are electrically connected with the controller. The device can simulate actual crop cultivation conditions, accurately control the irrigation amount and collect seepage water, seepage water collection is rapid and clean, the overall structure is stable, configuration is flexible, manufacturing cost and operation cost are low, maintenance is convenient, and the service life is long.

The application discloses a method for determining suitable development area of large-scale drip irrigation farmland in a shallow groundwater area, which comprises the following steps: coupling a MODFLOW model and a SWNCM-2D model based on programming software to develop a coupling model suitable for simulating water and salt migration in saturated and unsaturated zones and crop growth of large-scale drip irrigation farmland in a shallow groundwater area; according to underground water depth control test data of a lysimeter, key parameters of the coupling model are calibrated and verified, multi-scenario simulation under different underground water depths is carried out, and suitable underground water depth under drip irrigation is determined; scenes with different proportions of drip irrigation farmland area are set, the coupling model is used for simulation, suitable underground water depth is taken as a control standard, and suitable development area of large-scale drip irrigation farmland in a shallow groundwater area is determined; and the method provides technical support and quantitative basis for development and field management of large-scale drip irrigation farmland through multi-model coupling, multi-process simulation and multi-scenario analysis.

The utility model relates to the technical field of soil monitoring, and provides a lysimeter which comprises a weighing barrel, a permeable membrane and a monitoring assembly, the weighing barrel is provided with a first opening and a second opening, the first opening is formed in the upper end of the weighing barrel, and the second opening is formed in the lower end of the weighing barrel; the permeable membrane is laid at the second opening and is used for assisting moisture movement of the to-be-detected soil; the monitoring assembly is arranged on the weighing barrel and used for monitoring the weight of the to-be-measured soil, the soil water potential of the to-be-measured soil and the soil moisture of the to-be-measured soil. According to the lysimeter provided by the utility model, the original closed bottom is replaced by the permeable membrane material, so that the bottom of the weighing barrel is changed into an open design, the problem that soil to be measured is not communicated with natural soil below can be solved, and water can freely circulate between the soil to be measured and the natural soil; and the movement condition of field moisture can be simulated more truly.

To provide an inclined lysimeter capable of quantitatively measuring the amount of infiltrated water from snowmelt water and rainwater that infiltrates into the ground on a slope, and the amount of snow-covered bottom flow that flows down the slope without infiltrating. [Solution] The inclined lysimeter 1 of the present invention is a device for measuring the amount of seepage water, of snowmelt water and rainwater, that infiltrates into the ground and the amount of snowbed flow that flows down the slope without infiltrating within a measurement area within a slope 200. It is a box-shaped device with a bottom and an upper opening 11, and includes a main body 10 that is buried in the slope, a mesh-like partition plate 20 that divides the main body into an upper space 10U and a lower space 10L, sediment 100 that is filled in the upper space, a snowbed flow measuring unit 30 that collects and measures the amount of snowbed flow that flows down the surface of the sediment, and a seepage water measuring unit 40 that collects and measures the amount of seepage water that infiltrates the sediment and reaches the lower space. The snowbed flow measuring unit can measure the amount of snowbed flow, and the seepage water measuring unit can quantitatively measure the amount of seepage water.

The application discloses a kind of multifunctional compound planting system evapotranspiration process dynamic monitoring device and method, lysimeter measuring cylinder is arranged in the upper portion of lysimeter filter layer, soil evaporation barrel and intercropping crop lysimeter barrel are buried in the soil of lysimeter measuring cylinder top portion, soil moisture sensor is connected to the outer wall of one side of lysimeter measuring cylinder, automatic water supply device is connected to the bottom of the outer wall of the other side, with automatic water supply device is located in the same side, groundwater supply device and water level gauge are equipped in the bottom of lysimeter filter layer, the other side is equipped with drain pipe, drain pipe is connected with leakage device, lysimeter filter layer bottom is connected with weighing sensor, drip irrigation belt is arranged in crop row;Based on lysimeter weight, soil moisture, irrigation data, automatic water supply data, groundwater recharge data, drainage data, leakage data and meteorological data, the change of soil storage water quantity is calculated.The application can accurately characterize the evapotranspiration process of compound system.

The utility model relates to the technical field of soil moisture monitoring, and discloses a weighing type lysimeter which comprises a cultivation box, a weighing sensor and a controller, a supporting frame is arranged at the bottom of the cultivation box, a lifting mechanism used for driving the cultivation box to move up and down is arranged on the supporting frame, and the weighing sensor is located between the lifting mechanism and the cultivation box. A seepage collecting barrel communicated with an inner cavity of the cultivation box is arranged at the bottom of one side of the cultivation box, a drainage valve is arranged at the bottom of the seepage collecting barrel, a drip irrigation pipe is arranged at the top of the cultivation box and connected with a water inlet valve, and the weighing sensor, the water inlet valve and the drainage valve are electrically connected with a controller. According to the lysimeter, water can be automatically supplemented to the lysimeter and leaked water can be discharged, different cultivation boxes can be conveniently replaced for monitoring according to different scenes, and the lysimeter is high in monitoring precision, long in service life and easy and convenient to maintain.

The present application relates to the technical field of measurement method, and particularly relates to a method for calculating orchard inter-plant evaporation, comprising: uniformly dividing a single fruit tree surface area with the fruit tree as the center; constructing a three-dimensional model of the fruit tree, importing a solar motion model into the three-dimensional model of the fruit tree, dividing the single fruit tree surface area into shaded areas and non-shaded areas, and generating a single fruit tree surface area solar radiation distribution model; dividing the single fruit tree surface area into irrigated wet areas and non-wet areas, determining the surface soil moisture content of different areas, and generating a single fruit tree surface area soil moisture distribution model; selecting different positions in the single fruit tree area to install micro lysimeters, and calculating the soil evaporation at different positions; importing the soil evaporation data into the solar radiation distribution model and the surface soil moisture distribution model, and calculating the orchard inter-plant evaporation; the present application improves the calculation accuracy of orchard inter-plant evaporation and the time resolution of inter-plant evaporation data.

The utility model relates to the technical field of lysimeter, in particular to a small self-weighing lysimeter with separated inner and outer cylinders, which comprises: an outer cylinder with an opening on the top wall, the bottom wall of the outer cylinder being provided with a water outlet; the pressure sensors are located in an inner cavity of the outer cylinder and connected with the outer cylinder, and a weighing platform is formed by the top walls of the pressure sensors; an opening is formed in the top wall of the inner cylinder, a sliding gap is reserved between the inner cylinder and the outer cylinder, a water seepage opening is formed in the bottom wall of the inner cylinder, and the bottom wall of the inner cylinder abuts against a weighing platform; the data acquisition unit is electrically connected with the pressure sensor and is used for recording and storing the quality data output by the pressure sensor; the lysimeter has the effect of reducing the influence on the measurement precision of the lysimeter when the measurement precision of the pressure sensor is changed due to the temperature change of the surrounding environment of the to-be-measured soil body.

The invention relates to the technical field of agricultural hydrology and environment monitoring, and discloses a lysimeter data quality control and optimization method based on machine learning, and the method comprises the following steps: S1, collecting lysimeter weighing data and at least one kind of environment covariable data in real time through an Internet of Things sensor network, and forming a multi-dimensional time sequence; s2, performing time alignment, missing value marking and standardization processing on the multi-dimensional time sequence to form a regular data set, and writing the regular data set into a time sequence database; and S3, carrying out anomaly detection and classification marking on the regular data set by adopting a progressive multi-mode collaborative anomaly recognition method. Compared with the prior art, the method has the advantages that the anomaly recognition dimensions are diversified and accurate; data correction is intelligent and high in physical interpretability; the system is closed-loop and automatic, and has sustainable evolution capability; the operation and maintenance decision is scientific, and the response efficiency is remarkably improved; the technology integration level is high, and large-scale application is easy.

This disclosure relates to a device (1) for characterizing a soil heat treatment process, which comprises: A cylindrical lysimeter (10) having watertight side walls, open at its upper base, and whose lower base forms a watertight wall inclined with respect to the horizontal and having an opening equipped with a valve; A water pump (16) configured to inject and / or drain water into the lysimeter through the valve; A removable heating device (18) configured to be inserted vertically into the lysimeter through its open upper base, in a central area relative to the side walls; A three-dimensional array of temperature sensors (191-192) comprising at least one fiber optic sensor, the sensors being placed at different heights, radial distances, and angular positions within the lysimeter; Means for recording the temperatures measured by the sensors. Abstract figure: Figure 2.

The present disclosure relates to a device (1) for characterising a method for the thermal treatment of soil, which comprises: b. a cylindrical lysimeter (10) which has watertight side walls, is open at its upper base, and the lower base of which forms a watertight wall that is inclined with respect to the horizontal and has an opening equipped with a valve; c. a water pump (16) configured to inject water into and / or drain water from the lysimeter via the valve; d. a removable heating device (18) configured to be inserted vertically into the lysimeter through its open upper base, in a central zone with respect to the side walls; e. a three-dimensional array of temperature sensors (191-192) comprising at least one optical fibre sensor, the sensors being placed at different heights, radial distances and angular positions within the lysimeter; and f. means for recording the temperatures measured by the sensors.