| CPC C02F 1/008 (2013.01) [G01N 21/3103 (2013.01); G01N 21/33 (2013.01); G01N 21/3577 (2013.01); G01N 30/7206 (2013.01); G01N 33/1813 (2013.01); G01N 33/1833 (2013.01); G06N 5/04 (2013.01); C02F 2103/06 (2013.01); C02F 2209/006 (2013.01); C02F 2209/02 (2013.01); C02F 2209/06 (2013.01); C02F 2209/42 (2013.01)] | 14 Claims |
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1. An IoT-based system for measurement of contamination distribution of contaminated groundwater through real-time monitoring of a contamination degree of a contaminated groundwater well for prediction of a purification period based on a measurement result, the IoT-based system comprising:
a sensor unit mounted in each of a plurality of wells excavated to purify contaminated groundwater, the sensor unit comprising a contamination degree sensor for measuring a degree of contamination by contaminants, a pH sensor, a temperature sensor, a water level sensor, a pumping amount sensor, and a rainfall sensor;
a server unit configured to collect sensor data transmitted from the sensor unit and to classify the sensor data based on a data type; and
a web dashboard unit configured to display the sensor data transmitted from the server unit to enable a user to verify or control desired sensor data on a well basis and on a data-type basis in real time, the web dashboard unit comprising a purification-area-based status screen, a main screen, a contamination degree screen, a pumping amount screen, a groundwater level screen, an indirect purification factor screen, a contaminated-area-sensor-data-based movement distribution history screen, a distribution comparison screen, a purification control screen comprising a sensor-data-type selection window enabling selection of a type of sensor data, the sensor-data-type selection window being displayed in a contamination map screen, in which a range of a contaminated area, a depth of contamination, a value of each type of sensor data on a well basis, a two-dimensional or three-dimensional potentiometric surface map based on the value of each type of sensor data, a location of a purification device, locations of the wells, and connection pipes are displayed on a contaminated area map, and a purification period prediction screen displaying a change in the value of each type of sensor data in a contaminated area,
wherein the contaminated groundwater is purified such that the contaminated groundwater is pumped from the plurality of wells and is purified on a ground by the purification device or such that a purification agent is injected into each of the plurality of wells and the contaminated groundwater mixed with the purification agent is pumped and purified by the purification device,
wherein the contaminants comprise: petroleum-based contaminants comprising benzene, toluene, xylene, ethyl benzene, total petroleum hydrocarbon (TPH), trichloroethylene (TCE), tetrachloroethylene (PCE), organophosphorus compound, PCB, cyan, and phenol; and heavy metal contaminants comprising arsenic, lead, cadmium, hexavalent chromium, copper, mercury, zinc, nickel, and fluorine,
wherein the contamination degree sensor is selectively implemented, depending on the contaminants, as any of analysis devices comprising a gas chromatograph (GC), a gas chromatography-mass spectrometer (GC-MS), an atomic absorption spectrophotometer, an atomic emission spectrophotometer, an absorption spectrophotometer, an infrared spectrophotometer, and an ultraviolet spectrophotometer,
wherein the contamination degree sensor measures a degree of contamination using contaminated groundwater sampled from the wells,
wherein the purification-area-based status screen comprises: a status screen configured to display a construction project name, a construction period, types of contaminants, a cause of contamination, a purification standard, and a purification promotion history; and a contamination map screen, in which a range of a contaminated area, a depth of contamination, a location of the purification device, locations of the wells, and connection pipes are displayed on a contaminated area map,
wherein the main screen comprises a sensor-data-type selection window enabling selection of a type of sensor data, and displays a value of each type of sensor data selected from each of the plurality of wells and a two-dimensional or three-dimensional potentiometric surface map based on the value of each type of sensor data on a contaminated area map,
wherein the contamination degree screen comprises: a contaminant-type selection window enabling selection of a type of contaminant; a contamination modeling diagram, in which a degree of contamination by a contaminant selected from each of the plurality of wells and a two-dimensional or three-dimensional potentiometric surface map of the contaminant based on the degree of contamination by the contaminant are displayed on a contaminated area map; a contamination degree chart indicating a numerical change in the degree of contamination by the contaminant selected from each of the plurality of wells; and a contamination data table indicating the degree of contamination by the selected contaminant on a well basis and on a date basis,
wherein the purification period prediction screen comprises a sensor-data-type selection window enabling selection of a type of sensor data, the sensor-data-type selection window being displayed in a contamination map screen, in which a range of a contaminated area, a depth of contamination, a value of each type of sensor data on a well basis, a two-dimensional or three-dimensional potentiometric surface map based on the value of each type of sensor data, a location of the purification device, and locations of the wells are displayed on a contaminated area map,
wherein the purification period prediction screen further comprises a period slide bar enabling selection of a start date and an end date, and displays a change history of a selected sensor data during a selected period, the change history of the selected sensor data comprising a range of a contaminated area, a depth of contamination, a value of each type of sensor data on a well basis, and a two-dimensional or three-dimensional potentiometric surface map based on the value of each type of sensor data,
wherein the purification period prediction screen is configured to output a predicted value of a degree of contamination after a predetermined period and a predicted value of a purification period, and wherein the predicted value of the degree of contamination after a predetermined period and the predicted value of the purification period are calculated in real-time using a program of a computer executed based on a purification period prediction algorithm comprising an exponential function below:
C=C0e−kt
where C indicates a degree of contamination (mg/L) of groundwater after a predetermined period, C0 indicates an initial degree of contamination (mg/L) of groundwater, k indicates a reduction coefficient (day−1), and t indicates a time (day),
wherein the predicted value of the degree of contamination after a predetermined period is calculated such that the reduction coefficient k (day−1) is calculated from the degree of contamination C (mg/L) of groundwater after a predetermined period (day) and the initial degree of contamination C0 (mg/L) of groundwater, among sensor data of the contamination degree sensor, a graph of the exponential function is output, and the predicted value of the degree of contamination after a predetermined period (day) is calculated using the graph,
wherein the predicted value of the purification period is calculated such that the reduction coefficient k (day−1) is calculated from the degree of contamination C (mg/L) of groundwater after a predetermined period (day) and the initial degree of contamination C0 (mg/L) of groundwater, among sensor data of the contamination degree sensor, a graph of the exponential function is output, a contamination purification target is set using the graph, and a period within which it is required to accomplish the contamination purification target is calculated as the predicted value of the purification period.
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