There is provided an apparatus for forecasting water demand of a waste system using an automation system. The apparatus for estimating water demand includes a water demand estimation setting unit configured to collect user input data, a control unit configured to collect the record data and the user input data from the SCADA system, perform a learning process on each of a plurality of algorithm combination groups including at least one algorithm to select any one algorithm combination group, and input the record data and the user input data to the selected algorithm combination group to calculate water demand estimation data, a storage unit configured to store the record data collected from the SCADA system, store the user input data, and store the water demand estimation data, and a water demand estimation output unit configured to output the calculated water demand estimation data.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. An apparatus for estimating water demand, the apparatus comprising: a water demand estimation setting unit configured to collect user input data; a control unit configured to collect the record data and the user input data from the SCADA system, set an upper limit value and a lower limit value among the data collected, compare a value with the upper limit value and the lower limit value to extract a value (normal data) present within the limit value range, set the extracted normal data as water demand estimation data, perform a learning process on each of a plurality of algorithm combination groups including at least one algorithm to select any one algorithm combination group, and input the record data and the user input data to the selected algorithm combination group to calculate water demand estimation data; a storage unit configured to store the record data collected from the SCADA system, store the user input data, and store the water demand estimation data; and a water demand estimation output unit configured to output the calculated water demand estimation data. 2. The apparatus of claim 1, wherein the control unit includes: a record data collecting unit configured to collect the record data from the SCADA system; a record data processing unit configured to set an upper limit value and a lower limit value among the data collected, compare a value with the upper limit value and the lower limit value to extract a value (normal data) present within the limit value range, and set the extracted normal data as water demand estimation data by the record data collecting unit; an algorithm combining unit configured to generate a plurality of algorithm combination groups including at least one algorithm and select any one algorithm combination group among the generated algorithm combination groups; and a water demand estimation result calculating unit configured to calculate water demand estimation data by inputting the record data and the user data to the selected algorithm combination group. 3. The apparatus of claim 2, wherein the algorithm combining unit sets the number of algorithms to be included in at least one algorithm combination group, performs a learning process on each of the algorithm combination groups including algorithms combined according to the number, and extracts any one algorithm combination group. 4. The apparatus of claim 3, wherein the algorithm combining unit gives a weighted value of each algorithm according to the learning process performed on each of the combined algorithm groups, and extracts an algorithm combination having the uppermost weight value or an algorithm combination having the smallest error value with respect to reference estimation result data. 5. The apparatus of claim 2, wherein the control unit further includes a calculation result verifying unit configured to verify the result calculated by the water demand estimation result calculating unit. 6. The apparatus of claim 2, wherein the control unit further includes: an error compensating unit configured to give a weighted value to water demand estimation data within a threshold range period from the current time, among the water demand estimation data calculated by the water demand estimation result calculating unit, and compensate an error with respect to hourly estimation result data. 7. The apparatus of claim 1, wherein the storage unit includes: a record storage unit configured to store record data collected from the SCADA server; a setting storage unit configured to store user input data; and an estimation data storage unit configured to store calculated water demand estimation data under the control of the control unit. 8. The apparatus of claim 7, wherein the record storage unit collects record data periodically from the SCADA server or outputs data collected in real time to the control unit periodically.