KR20170067371A

KR20170067371A - Operation of the system in agricultural irrigation

Info

Publication number: KR20170067371A
Application number: KR1020150173964A
Authority: KR
Inventors: 이재혁; 최범준; 김필식
Original assignee: 주식회사 유일기연
Priority date: 2015-12-08
Filing date: 2015-12-08
Publication date: 2017-06-16

Abstract

The operation plan of the agricultural irrigation system according to an embodiment of the present invention is based on a method of operating an irrigation water system for an agricultural irrigation system for efficient water utilization and operation management of a current irrigation water system by deriving a rational operation rule for water use A first step of selecting a target region to which the irrigation system is required, a second step of grasping a weather status of the selected target district, a third step of grasping the status of the target irrigation channel, A fourth step of simulating the irrigation system of the target district by using the water analyzing program, and a fifth step of analyzing the network of the target district simulated by the irrigation water analysis program.

Description

Technical Field [0001] The present invention relates to an agricultural irrigation system,

The present invention relates to an operation method of an irrigation water system for agricultural use, specifically, a rational operation rule for water use, and a method for operating an irrigation water system for an efficient water utilization and operation management of an irrigation water system .

In recent years, Korea's water resources have been threatened because of the extreme drought, the low water level of Soyang River Dam, which is the largest multi-purpose dam in Korea, has reached the lowest water level since 1978 and the low water level has dropped to the lower limit of water supply to Chungju Dam. In this situation, it is necessary to make continuous efforts for efficient allocation and utilization of water resources so that the water resources that have been recycled can be used continuously. The agricultural quantity is the largest in Korea, accounting for about 48% of total water use. However, large amounts of agricultural water are wasted due to the indiscreet use of agricultural water and the lack of operational management measures. Therefore, there is a need for efficient operation of agricultural water use. Although Korea has been traditionally used as an irrigation system for agricultural irrigation, it has not been used efficiently due to the aging of the existing agricultural irrigation system and excessive water loss. As a result, drought damage has occurred and the auxiliary water source And the like. For this reason, there is a tendency that the transition to the irrigation system, which is less influenced by the terrain and can supply water with stability, is increasing. In particular, as the construction of large-scale agricultural complexes such as Saemangeum is increasing, interest in installation and maintenance of economic repair facilities is increasing (Kim, Kyung-Wan, etc., 2013). In Korea, agricultural irrigation has been implemented since the mid 1980s. Typically, the Hainan district is the first agricultural irrigation system in the whole of the reclamation project district, where the entire water system is piped. However, there is no regulation on special water management in the currently operating agricultural irrigation system district, and irregular operation is being performed according to the request of water supply of the user. In the case of irrigation canal, the amount of irrigation is shortened in comparison with the existing irrigation channel, but the amount of irrigation is shortened, but the amount of irrigation is too large because it can not be applied properly according to the change of the irrigation time (Park et al., 1997). In order to prevent the waste of water resources caused by these problems, the operation standard of agricultural irrigation water is required, but currently there is no operation standard for agricultural irrigation water. As the supply of water is made according to the request of the customer according to the current operation mode in which the special supply plan is not performed, the difference between the demand amount and the supply amount is caused due to the excess supply water, And it is difficult to supply an appropriate amount in a timely manner.

As the existing agricultural waterway, the waterway loss is large, there are disadvantages such as topographical constraints, inflow of pollutants. As a result, in the 1980s, an irrigation water treatment project has been implemented for efficient water supply in Korea. However, at present, Korea has about 500 km of irrigation water in the total of 117,000 km of irrigation water, and the rate of conversion to irrigation water in Korea is very low. Although there are ongoing studies on the optimum design method and economical efficiency analysis for the agricultural irrigation system for agricultural advanced, there is little research on maintenance and facility operation plan.

In this study, EPANET, a pipe network analysis model, was applied to the Haenam Earth Irrigation System, which supplies 1,125ha irrigation water using irrigation system.

As a result of simulating the supply performance evaluation of the existing facilities through a single interpretation, it was analyzed that the supply capacity / required quantity ratio is 2.63 and the water supply capacity can be secured.

The analysis of the hydraulic behavior, pressure, and diagonal line in the pipeline was analyzed to provide the necessary information to maintain the facility. As a result of the analysis of the hydraulic behavior in the pipeline and the comparison of the permissible design standard values proposed in the "Design Guidelines for Agricultural Production Infrastructure Maintenance Project (Waterway Route)", the flow velocity, pressure, Respectively. In order to analyze the efficiency enhancement of the irrigation water in Haenam district, we constructed the supply pattern with 24 hours of pump operation and compared the required quantity and supply quantity of the target district with the extension period simulation technique, The efficiency improvement according to the amount of water used was analyzed. The amount of excess supply over time in the target area of the target district was 0.33% ~ 37.59%.

Through this, it is expected that the rational operation regulation for water use will be derived and it will be helpful for efficient water use and operation management of the current irrigation water system.

According to the present invention, it is possible to derive a rational operation regulation for the use of water and to facilitate the efficient water utilization and operation management of the present agricultural irrigation system.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram illustrating a study flow chart of an operational scheme of an agricultural irrigation system according to an embodiment of the present invention; FIG.
FIG. 2 is a schematic view showing a target region of an operation plan of an agricultural irrigation system according to an embodiment of the present invention; FIG.
FIG. 3 is a water system diagram of an operation district of an agricultural irrigation system according to an embodiment of the present invention; FIG.
FIG. 4 is a schematic diagram for explaining a simulation process using a hydraulic analysis program as an irrigation water for an operation method of an agricultural irrigation system according to an embodiment of the present invention. FIG.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept. Other embodiments falling within the scope of the inventive concept may readily be suggested, but are also considered to be within the scope of the present invention.

The same reference numerals are used to designate the same components in the same reference numerals in the drawings of the embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram illustrating a study flow chart of an operational scheme of an agricultural irrigation system according to an embodiment of the present invention; FIG.

Referring to FIG. 1, in the case of a water pipe network in Korea, studies on the maintenance of pipe network such as hydraulic behavior, utilization amount, and water supply plan are conducted through pipe network analysis. However, in the agricultural irrigation system, there is a lack of research on maintenance and operation planning.

In this study, EPANET, a network analysis program developed by the US Environmental Protection Agency, was applied to agricultural irrigation system.

EPANET is a model developed to simulate hydraulic behavior, pressure, and flow rate within a water network (EPA, 2000). EPANET is able to simulate the repair and water quality changes of the steady flow of the water supply network system, and graphical simulation results can be obtained through pipe network analysis by inputting and converting coordinate values by linking GIS.

Therefore, in this study, the analysis of the pipe network was carried out for the existing facilities using the EPANET in the Haenam District 3, an agricultural irrigation system constructed as a reclamation project in the Southwest Seas. Through this analysis, the performance evaluation of supply capacity and demand quantity, the state of hydraulic behavior in the pipeline from the reservoir to the end of the supply target area were analyzed, and an efficient water supply plan was analyzed by analyzing the operation plan of the agricultural water supply system.

Referring to FIG. 1, the procedure of the research is largely composed of five steps.

In the first step, basic data such as pipe diameter, pipe length, pump specifications, reservoir, ground level, and amount of water required for pipe network analysis were collected.

Second, based on the collected basic data, the network system of Haenam district network system was established and a single analysis of the steady state simulation of the network of the constructed target district was conducted to compare the supply capacity with the required quantity. Respectively.

The analysis of the hydraulic behavior in the pipeline was performed through a single analysis on the irrigation system of the constructed Hainan District 3 tool.

Finally, an efficient water supply plan for the existing water supply was proposed by analyzing and simulating the water supply volume and the required quantity of the agricultural water supply system under the condition of the pump operation 24 hours through the time change simulation (EPS).

FIG. 2 is a schematic view showing a target district in an operation plan of an agricultural irrigation canal system according to an embodiment of the present invention. FIG. 3 is a schematic diagram illustrating a water system flow diagram of a target irrigation system in an operation plan of an agricultural irrigation canal system according to an embodiment of the present invention. to be

4 is a schematic diagram for explaining a simulation process using a hydraulic analysis program as an irrigation water for an operation method of an agricultural irrigation system according to an embodiment of the present invention.

2 to 4, the operation plan of the agricultural irrigation canal system according to an embodiment of the present invention derives a rational operation rule for the use of the irrigation water, In the operation method of the agricultural irrigation system, the first step of selecting a target district to which the irrigation system is required, the second step of grasping the selected weather conditions of the target district, A third step, a fourth step of simulating the irrigation system of the target district by using the irrigation water analysis program, and a fifth step of network analysis of the target region simulated by the irrigation water analysis program .

The first step is a step of selecting a target region for which the application of the irrigation system is required.

Specifically, Haenam District 3 is managed by the Haenam branch of the Korean farming and fishing village, as shown in Figure 2, and is located in Haenam-ri, Haenam-eup, Haenam-eup, Haenam-gun, Jeollanam-do in Yeonnam-gun, Nasari, Songhori, Wahori, Gwangpuri and Ilshin. Hainan District 3 Agricultural Irrigation System started in 1987 as a reclamation project in the south coast of Haenam district. The completion of 3-1 tool in 2002 and 3-2 in 2004 was completed.

Based on the water source secured at Haenam Lake, which was constructed as a reclamation project in the west coast of South Korea, 6,125,500m of water main trunk line and 21,1839m of water main trunk line were appropriately allocated from the reclaimed land of 6,95ha and 430,200ha, ha.

The second step is a step of grasping the weather status of the selected target district.

Specifically, the Haenam district belongs to the Monsoon area, and the seasonal characteristics of the seasons are distinguished. Therefore, from June to September during the summer season, it is hot and humid due to the effects of oceanic high pressure. In winter, it is affected by the continental climate, (Rural Community Corporation, 2009).

The annual rainfall at the time of design of Hainan district ranged from 700.6mm to 1749.7mm and the average annual rainfall was 1,253mm.

Most of the rainfall distribution showed high concentration of about 60% of annual rainfall during the period of high temperature and high humidity in June ~ September, and the rainfall distribution of Korea was well represented.

The average annual temperature is 13.6, which is somewhat higher than the national average annual temperature of 12.5. The average difference between June and September is about 2, and the mean temperature was about 23 during this period.

The average relative humidity is 74.8%, showing a high distribution. The minimum relative humidity is 71%, appears in October ~ December, and the maximum relative humidity is 83%, which was investigated in July. It can be seen that the meteorological characteristics are well seen in this basin.

The third step is to grasp the current status of the target district in the water.

Specifically, the main water source of the Hainan District 3rd Agricultural Irrigation System is Hainan Lake. The Haenam Lake has 649 ha in the basin area, making it difficult to secure a supply of 1125ha of 3 units.

The water is pumped to the two reservoirs through the pumping station and supplied to the terminal through the water main trunk, the water trunk line, and the water purge using the installed water channel in the earth. The drainage is designed to allow the natural exclusion of the flood amount in the earth as much as possible, and the installed drainage and drainage lines are straightened to make the drainage smooth by maximizing the topography.

The diagram of the water system of Hainan District 3 tool is shown in Fig.

From the paddy pumping station, two reservoirs are pumped with high water supply and low pumping capacity. In the low-lying water supply reservoir, water supply is provided for the No. 1 trunk line waterway and the No. 2 trunk line waterway, while the highland water supply reservoir supplies water to the No. 4 trunk line trunk line, No. 5 trunk line trunk line, and No. 6 trunk line trunk line through the No. 3 trunk line . The three trunks branch off and the final six trunks irrigate the entire area. The trunk line No. 5 is installed as an open waterway on the grounds of the earth and the remaining five trunks are irrigation channels.

Among the 21 trillion water supply branches, 18 trillion trillion trillion trillion won and 86 trillion trillion trillion trillion trillion. The main line of the water main line is 500 ~ 800mm as the diameter of the 1st main line water line, 350 ~ 800mm as 2nd main line water line, 700 ~ 1100mm as 3rd main line water line, 450 ~ 600mm as 6th main line water line 400mm as main line water line, Is composed of dogs.

The fourth step is a step of simulating the irrigation system of the target district by using a repair analysis program with irrigation water.

Specifically, the basic data of the target district input to the EPANET for the pipe network analysis of the irrigation system is constructed by the diameter of the pipe, the pipe extension, the number of the roughness meter according to the pipe material, the plan chart, Field survey and design drawings of Haenam branch of farming and fishing village were used to collect input data for the model. Fig. 4 shows a procedure for constructing input data necessary for pipe network analysis.

Based on GIS-based interworking, which is an advantage of the EPANET program, the spatial data and the floor plans of the collected field data were utilized to form a more accurate network by using the back ground function. Based on Map Dimensions, we obtained basic data on the divergence between the satellite images of the target district and the ground used in the back ground.

Based on the results of analysis of the basic data and the GIS based construction data through field survey, it was found that the main trunk line 5 trillion (1 trunk, 2 trunk, 3 trunk, 4 trunk, 6 trunk) 8,881.71m, The input data was constructed with the water of 14,830m.

The input data for the No. 5 trunk line, the No. 5 branch line and the 6-2 branch line, which are the irrigation organizations, were not constructed. EPANET construction result As shown in Fig. 4, we have established a pipe network for the water network in Haenam district.

The fifth step is a pipe network analysis of the target region simulated by the repair analysis program with the irrigation water.

Specifically, grasping the hydraulic behavior in the pipeline can be an important factor in the maintenance of future facilities of the irrigation system. Hainan District Agricultural Irrigation Water System has been completed in 2004 and operated TM / TC. Through the concentrated water management system, agricultural infrastructure facilities such as main water source, water main trunk line and drainage facilities can be managed from a centralized management center through systematic and efficient water management And the establishment of a scientific water management infrastructure to streamline water management costs and water allocation through facility management.

However, in Korea, including the Hainan district, there is insufficient installation of measuring equipment to maintain the hydraulic flow velocity and pressure in the pipeline.

In this study, the analysis of the hydraulic behavior in the pipeline of the target earth was analyzed by analyzing the pipe network of the target district using EPANET.

The analysis results are based on the design criteria of the agricultural production infrastructure maintenance plan design standard - irrigation route (Ministry of Agriculture, Forestry and Fisheries, 2009) Respectively.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be apparent to those skilled in the art that changes or modifications may fall within the scope of the appended claims.

Claims

As a result of the rational operation regulation for the use of water, the current management system of the irrigation water system for the efficient water use and operation management of the irrigation water system,
A first step of selecting a target region where application of the irrigation system is required;
A second step of grasping the selected weather information of the target district;
A third step of grasping the current state of the water of the target district;
A fourth step of simulating the irrigation system of the target district by using the irrigation water analysis program; And
And a fifth step of analyzing the target region simulated by the repair analysis program with the irrigation water.