JP2003147749A - Maintenance-control method for reservoir - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a maintenance-control method for reorganizing a reservoir for disusing and integrating small-to-medium sized agricultural dangerous reservoirs, and to effectively use sludge generated in an agricultural water source as materials of an agricultural base maintenance facility. SOLUTION: In maintenance-control including integration and disuse of the reservoir, this maintenance-control method of the reservoir is constituted in such a way that the disusing reservoir is reclaimed by a construction method causing no change from a present state flood quantity even after reclamation, a pipe is laid to the disusing reservoir from the integrating reservoir, and prevents a hindrance to water of the disusing reservoir, or the water is gathered by introducing the water to the integrating reservoir by the pipe from a basin of the disusing reservoir, and is characterized by changing no present state flood quantity by keeping flood delivery in a present state shape, reclaiming the reservoir by leaving the shallow water depth below a present state full water surface of the disusing reservoir, and changing no present state flood quantity by minimizing an improvement in the flood delivery.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a maintenance / management method for reorganizing a pond that abolishes and integrates small and medium-sized agricultural dangerous ponds, and also effectively uses sludge generated in an agricultural water source as a material for an agricultural infrastructure maintenance facility. Maintenance including consolidation and abolition of Tameike
Regarding management method.

[0002]

2. Description of the Related Art Small and medium-sized agricultural ponds are not artificially controlled for flood control. That is, at the time of flood, there is a flood control function by the full surface when the ratio of the amount of inflow, the area of the reservoir and the area of the inflow area is 1:30 or less, and when the ratio is 1:30 or more. The flood volume is calculated on the assumption that there is no flood control function. 2. In addition, when the reservoir is rehabilitated, spillway will be installed in consideration of the safety of the dam body of the reservoir, but it is not necessary to study the drainage capacity of the downstream canal. 3. Among the small and medium-sized agricultural reservoirs, the dangerous reservoir is abolished and integrated into an efficient reservoir, and the reservoir is being restructured to make it a safe and inexpensive facility. 4. When abandoning a pond and reclaiming it, it is possible to reclaim the abandoned pond after taking measures against the downstream drainage capacity. 5. In any case, the consent of the parties concerned is to be obtained.

6. Since the consolidation and abolition of the reservoir is limited to the same water system, the pipe plan is to be planned as a separate project from the reservoir restructuring project. 7. Sludge is treated as residual soil or as industrial waste.

[0004]

[Problems to be Solved by the Invention] 1. As a result of examining the drainage capacity of the downstream drainage channel of the dangerous reservoir, if the drainage channel is not drained, the drainage channel should be repaired first, and then the abandoned reservoir should be reclaimed. Therefore, if the dangerous pond is rehabilitated first, the project cost will be higher than if it is abolished and integrated, and the subsequent cost will also be higher. The problem was a construction method and method that could be implemented safely, inexpensively, and quickly with a limited budget. 2. In addition, even if the downstream drainage canal has already been constructed, it is believed that the people involved in the downstream will increase the flood volume by reclaiming the reservoir.
In many cases, it is not possible to abolish the reservoir without obtaining consent for landfill. Therefore, if it cannot be abolished and repaired, a large amount of public investment will be involved. In general, comparing the case of rehabilitating a reservoir with the case of abolishing and reserving the amount of stored water in the integrated reservoir by dredging, the abandoned integrated construction method cost is about 1 for 10 of the renovation method. From the above, in any case, obtaining the consent of the downstream parties was an issue.

1. The consolidation and abolition associated with the restructuring of the pond was limited to the same water system. In addition, the upstream side is an integrated reservoir
It will be limited to the abandoned reservoir on the downstream side. For this reason, the purpose of the reorganization and maintenance of the reservoir has not been fully fulfilled in the small and medium-sized reservoirs with high density. Another problem is that a lot of labor is required because the pipe and other projects and Tameike reorganization project are planned and implemented as separate projects. 2. The sludge generated at the water source is mixed with a solidifying agent or dry soil, adjusted in water content, carried out, and discarded as residual soil or treated as waste. Therefore, it is necessary to use it effectively. Is an issue.

[0006]

In order to solve the above problems, the inventions of claims 1 to 8 are: Explain the damage caused by the lack of the dangerous pond and the current condition of the drainage that was reclaimed without changing the current flood amount of the abandoned pond. Then, explain that the drainage canal will be rehabilitated one after another and agree to solve the problem. 2. In other words, by respecting the current shape of the spillway of the abandoned basin and disclosing the basin by a landfill method that does not increase the flood volume, and explaining to the downstream parties that the landfill will be completed, it is easy to obtain consent and solve the problem. To do. 3. Even if the downstream drainage is not developed, if the flood volume of the abandoned reservoir is not changed, the drainage at the downstream is the current situation, and the reservoir should be reclaimed first in order to prevent the collapse of the reservoir with a high degree of urgency. If you explain that it will be developed in stages, the consent of the downstream parties can be easily obtained and the problem will be solved.

Further, the inventions of claims 9 to 15 generally cover many water systems in the dense reservoir area for small and medium-sized agriculture. Therefore, it is possible to integrate and abolish many ponds, which is the purpose of restructuring and restructuring the ponds, and it is very effective to reduce the project cost for the time being. In addition, the reduction of the burden of subsequent costs can be greatly effective across generations. If the ponds built with the technology and wisdom at the time of the opening of the river were reconstructed with modern technology and wisdom using pipes, the problems will be solved progressively as a business that will remain in future generations.

Further, the inventions of claims 16 to 29 are: There is no purification facility as a water source for agriculture, and turbid water is directly directed to farmland for watering. Therefore, the present condition is that sludge is also flowing into farmland. Therefore, if the sludge generated in the water source is not treated as industrial waste and the sludge generated in the same water source is allowed to be used as a material for agricultural facilities in the same water source, the large amount of cost required for sludge treatment will be reduced. The problem is solved. 2. Depending on the type of solidifying agent used for the water source sludge, alkalinity may be high and PH is an environmental issue, but when compared with fertilizers used in farmland, it is a minute value. Considering this, the problem will be solved if the effective use of sludge as a material is permitted only in the same water system.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Inventions 1 to 8 It consists of landfilling with a shallow depth below the full surface of the abandoned pond, leaving the shape of the spillway as it is. 2. It consists of a drainage channel in the abandoned pond, which is filled up on the ground surface or filled up above the water level, and a spillway that is narrower than the existing spillway in which the spillway has a cutout equivalent to the drainage channel. Inventions of Claims 9 to 15 It consists of a water supply pipe connecting the abandoned reservoir and an integrated reservoir, a water supply pipe and a pump, and a water collection pipe. Inventions of Claims 16 to 29 It consists of slope protection work in which the water source sludge is fixed with a solidifying agent and attached to the slope. 2. Same as the above, it consists of slope protection work with a water stop layer inside the slope. 3. Consists of a slope protection law and pickled sludge mixed with a solidifying agent. 4. Consists of sludge base material mixed with solidifying agents.

[0010]

EXAMPLES Examples of the present invention will be described below with reference to the drawings, but the present invention is not limited to these examples.

FIGS. 1 (a) to 1 (d) are process drawings for landfilling the solidifying agent-mixed sludge of the integrated reservoir to the abandoned reservoir, FIG. 2 is a diagram for explaining the situation of a general abandoned reservoir, and FIG. FIG. 4 is an explanatory diagram in which the site of the abandoned reservoir is used as a biotope, FIG. 4 is an explanatory diagram in which the site of the abandoned reservoir is used as a square, and FIG. 5 is a flood caused by rising of the water level from the full water level 4 due to inflow from the inflow water area of the reservoir. FIG. 6 shows a situation in which the discharge flows into an overflow water flow, and FIG. 6 shows the abandoned reservoir 6b located upstream of the same inflow water area 12a of the integrated reservoir 5 and the other inflow water area 12b of the integrated reservoir 5 from the integrated reservoir 5. 1 shows a system for integrating and abolishing an abandoned reservoir 6c located upstream, an abandoned reservoir 6d located downstream of the integrated reservoir 5, and another inflowing water area 12c of the integrated reservoir 5 and an abandoned reservoir 6e located downstream of the integrated reservoir 5.

Since the present invention integrates and abolishes existing basins, the result of consolidation and integration requires the consent of the downstream parties. Therefore, before explaining a concrete method for maintaining and managing the basin, Explain the explanation to the related parties. 1. First, the function of the current pond will be explained. 2. That is, understand that the small and medium reservoirs do not artificially adjust their drainage. 3. Next, learn that there is rainfall and the reservoir is full of water before flooding. 4. Understand that the amount of rainfall increases and the amount of inflow from the inflow area 12 of the basin increases so that the water level of the basin rises, and the overflow depth 14 rises above the water level and the width of the existing spillway 3 is drained. Ask. 5. When the abandoned reservoir 6 is landfilled, the landfill surface 21 is the same as the full surface surface 4 of the existing reservoir, and if the spillway is in the current shape after the landfill, the flood volume will not change from the current flood volume. Obtain the consent of downstream parties. 6. Further, in order to use the landfill surface 21 as a plaza, a drainage channel 25 is installed, a spillway 23 is provided with a cutout 23, and the amount of flooding corresponding to that is reduced by reducing the width of the existing spillway 3 to form a landfill surface 21.
If the floor height 13 of the improved spillway 20 is made the same, the explanation will be the same as the current flood volume, and the consent of the downstream parties will be obtained with the understanding.

Embodiment 1 Referring to FIG. 1, a process of embankment of sludge in an integrated reservoir 5 into an abandoned reservoir 6 will be described. 1. Integrated reservoir 5 and gate 11 of bottom gutter 2 of abandoned reservoir 6
Open and drain the reservoir (Fig. 1a ₁ , b ₁ ). 2. A solidifying agent is sprayed on the sludge 8 of the abandoned reservoir 6 and mixed with a backhoe, etc., and then compressed with a roller or the like (Fig. 1
b ₂ ). 3. After the solidifying agent is sprayed on the sludge 8 of the integrated reservoir 5 and mixed with a backhoe or the like, it is loaded on a truck and transported to the abandoned reservoir 6 (Fig. 1a ₃ ). 4. The solidifying agent-containing sludge 51 carried into the abandoned reservoir 6 is rolled out to a certain thickness with a bulldozer or the like, and is rolled with a roller or the like (FIG. 1b ₃ ). 5. When the sludge transportation of the integrated reservoir 5 is completed, closing the gate 11 of the bottom trough 2 collects water up to the full surface 4 (Fig. 1
a _4). Further, if the inflow water continues from the running water area 12, it flows from the existing running water discharge port 3 to the overflow water depth 14 through the discharge channel 9 and flows down to the downstream drainage channel 10 (FIG. 5). 6. The abandoned pond 6 is landfilled up to the planned landfill surface 21 (Fig. 1b ₄ ).

Example 2 A method of using an abandoned reservoir as a biotope will be described. 1. The solidifying agent-mixing sludge 51 is rolled to finish under the planned landfill surface 21 (40 to 45 cm) with a roller or the like. 2. The subsoil 56 is loaded onto this by about 30 cm and compacted. 3. Further, the cultivated soil 57 is carried in by 10 to 15 cm and leveled by a bulldozer or the like to form the planned landfill surface 21. If the planned landfill surface 21 is about 20 cm below the full surface 4 of the abandoned reservoir 6, the water depth will be 2
A biotope of about 9 cm is completed (Fig. 3).

Example 3 Based on Fig. 1 and Fig. 4, the current state of the abandoned reservoir 6 shown in Fig. 2 is shown.
The site above the water-filled surface 4 is the planned landfill surface 21 and the site is a square.
Will be described (FIG. 4-a)₁, B ₁). 1. Embankment is performed in the same process from 1 to 4 of "Example 1". 2. Mix the solidifying agent under the planned landfill surface 21 to about 10 cm
Roll the sludge 51 with a roller to finish it. 3. On top of this, bring in about 10 cm of ordinary soil and roll it.
-They are rolled to form the planned landfill surface 21. 4. The planned landfill surface 21 is above the current full water surface 4. 5. Planned landfill for the small amount of wastewater that constantly flows from the inflowing water area 12.
Plan to fill a small drainage channel 25 to drain below surface 21
It is installed below the elevation 21. Drainage equivalent to drainage channel 25
Therefore, a spillway 23 is provided in the spillway. 6. The increase in flood volume was reduced by providing the cutout 23.
In order to reduce the current spillway 28, the spillway 20 will be improved.
The planned flood volume is the same as the existing flood volume. 7. Planned landfill surface 21 and improved spillway 20 have the same height 13
And 8. Downflow of a small drainage channel 25 installed on the planned landfill surface 21
If there is more rainfall than the capacity, the landfill surface 21 is temporarily flooded.
Therefore, it cannot be used as a plaza.

Embodiment 4 Based on FIG. 6, 5.1 integrated reservoirs and abolished reservoirs 6.
An example of five locations will be described. Further, a case will be described in which the amount of water stored in the abandoned reservoir 6 is secured in the integrated reservoir 5. 1. The abandoned reservoir 6a downstream of the integrated reservoir 5 having the same inflow area 12 as the integrated reservoir 5 is irrigated by using the existing canal 15 as usual. 2. The abandoned reservoir 6b upstream of the integrated reservoir 5 having the same inflow area 12a as the integrated reservoir 5 is provided with a pump 35 in the integrated reservoir 5 for water supply by a water supply pipe 33 for irrigation. 3. The abandoned reservoir 6c, which has the other inflow area 12b of the integrated reservoir 5 and is located above the integrated reservoir 5, is provided with a pump 35c in the integrated reservoir 5 to supply water with the water supply pipe 33 for irrigation. Further, the water flowing out of the inflowing water area 12b is collected in the water collecting basin 36b and collected in the integrated reservoir 5 by the water collecting pipe 34b. 4. The abandoned reservoir 6a, which has the other inflow area 12b of the integrated reservoir 5 and is located below the integrated reservoir 5, supplies water from the integrated reservoir 5 with the water supply pipe 32 for irrigation. 5. The abandoned reservoir 6e, which has the other inflow area 12c of the integrated reservoir 5 and is located below the integrated reservoir 5, is supplied with water from the integrated reservoir 5 by the water supply pipe 32 for irrigation. In addition, the inflow water area 12
The water flowing out of c is stored in the water collecting tank 36e, and the pump 35e
Then, the water is sent to the integrated reservoir 5 by the water supply pipe 33. 6. In this way, the pipe and pump 35 are "Kanpai business".
Therefore, it was not adopted as the “Tameike Reorganization Project”, but the effect of the Tameike Reorganization Project will be greater by planning this all together.

Example 5 A method of applying slope protection after pre-filling the ground 52 will be described with reference to FIG. 1. The embankment material 42 is spread to a certain thickness with a bulldozer or the like and is rolled with a roller or the like to embank it 52. 2. The slope 41 at the time of construction is cut and shaped into a temporary finished slope 43. 3. After the method frame 53 is assembled, the solidifying agent-mixed sludge 51 is applied as a medium crushed material, and the surface thereof becomes the finished slope 48.

Embodiment 6 A method for protecting slopes by simultaneously compacting the solidifying agent mixed sludge 51 at the same time as the embankment material 42 will be described with reference to FIG. 1. After the embankment material 42 and the solidifying agent mixing sludge 51 are squeezed out to a constant thickness, they are simultaneously piled up to a predetermined height while rolling. 2. Next, the slope 41 at the time of construction is cut into a temporary finished slope 43 and shaped to form a finished slope 48.

Embodiment 7 A method for carrying out slope protection with a water blocking layer 44 by simultaneously rolling the embankment material 42, the water blocking layer material 44, and the solidifying agent-containing sludge 51 will be described with reference to FIG. 1. Fill material 42, water stop layer 44, and solidifying agent mixture 51
While rolling at the same time, build up to a predetermined height. 2. Next, the slope 41 at the time of construction is cut and shaped into a temporary finished surface 43 to form a finished slope 48.

[0020]

EFFECTS OF THE INVENTION The inventions according to claims 1 to 8 having the above-mentioned structure are constructed by a construction method and an explanation method which make it easy for a person related to the downstream of the abandoned reservoir to understand that the flood amount will not increase even after the abolition of the reservoir. The effect of contributing to mitigation and regional disaster prevention is great, and since it has little effect on the downstream area, it is easy to obtain the understanding of the people involved in the downstream area. In addition, the inventions of claims 9 to 15 can incorporate a large number of reservoirs in the reservoir restructuring project by integrally planning the reservoir restructuring project in the same project as the pipe, thereby reducing public investment and regional disaster prevention. The effect of contributing to is great. Furthermore, in the inventions of claims 16 to 29, if the sludge generated in the water source is used as a material for agricultural infrastructure maintenance in the same water system, the cost saving effect is great.

[Brief description of drawings]

[Fig. 1] Landfill of sludge mixed with solidifying agent in integrated reservoir
FIG. a is an integrated reservoir. b is an abandoned reservoir. a₁
Indicates the current status of the integrated reservoir. b₁Indicates the current status of the abandoned reservoir
You a_TwoIndicates the situation where the water in the integrated reservoir is drained. b_TwoIs
Drain the water from the abandoned pond, mix the sludge with the solidifying agent, and compact it.
Shows the situation. a_ThreeCarried out sludge b_ThreeEmbankment
Show the degree. a_FourCollects water again after carrying out sludge from the integrated reservoir
It shows the situation. b _FourIs the situation where the embankment of the abandoned reservoir is completed
Indicates.

FIG. 2 is an explanatory diagram of the current state of an abandoned reservoir. a is the whole pond,
b shows the details of the spillway.

FIG. 3 is an explanatory diagram of a case where a site of an abandoned reservoir is used as a biotope. “A” shows the whole reservoir, and “b” shows the details of the spillway.

FIG. 4 is an explanatory diagram of a case where the site of the abandoned reservoir is used as a plaza. “A” shows the whole reservoir, and “b” shows the details of the spillway.

FIG. 5 is an explanatory diagram of a situation in which the water level rises from the full surface due to the inflow from the inflow water area of the reservoir, and the spillway causes the overflow depth to flow down.

FIG. 6 is an explanatory diagram of consolidation and abolition of a plurality of abandoned reservoirs.

FIG. 7 is an explanatory diagram of an example of a step of using a slope of a slope.

FIG. 8 is an explanatory diagram of a process in which a solidifying agent-mixed sludge is used to protect the slope.

FIG. 9 is an explanatory diagram of a process in which a solidifying agent-containing sludge and a water blocking layer material are used to protect the slope.

FIG. 10 is a cross-sectional view of an example in which the solidifying agent-containing sludge containing aggregate is used for road paving.

FIG. 11 is a cross-sectional view of an example in which an aggregate is sprinkled on a roadbed of a solidifying agent-mixed sludge to perform rolling and to increase a frictional resistance value.

[Explanation of symbols]

1 embankment 2 Bottom gutter 3 current spillway 4 full surface 5 integrated reservoir 6 abandoned reservoir 7 pond 8 sludge 9 Floodway 10 Downstream drainage 11 gates 12 Inflow area 13 Improved spillway height 14 Overflow depth 15 Existing canal 16 farmland 17 Land Line 18 Current spillway height 19 Embankment surface 20 Improved spillway 21 Plan landfill 22 Reduced spillway width 23 Missing 24 Drainage floor 25 drainage channels 26 thickness 27 Improved spillway width 28 Current spillway width 29 Biotope water depth 30 waterway drainage surface 32 Water supply pipe 33 Water pipe 34 Water collection pipe 35 pumps 36 water collecting basin 40 ridge 41 Slope at the time of embankment construction 42 Embankment material 43 Finish slope 44 Water stop layer 45 Solidifying agent-sludge roadbed material 46 surface 47 Dredging 48 Finish slope 49 Conventional slope protection 50 Solidifying agent sludge compaction 51 Solidifying agent sludge 52 Embankment 53 legal framework 54 Mizuta ridge 55 Field Law 56 heart soil 57 cultivated soil 58 Aggregate-containing solidifying agent sludge 59 Foundation 60 aggregate

Claims (29)

[Claims] 1. A maintenance and management method for a reservoir that is to be reclaimed by a construction method that does not change from the existing flood amount even after reclamation in the maintenance and management including consolidation and abolition of the reservoir. 2. The method for maintaining and managing a pond according to claim 1, wherein the spillway does not change the current flood volume by keeping the current shape. 3. The method for maintaining and managing a pond according to claim 1 or 2, wherein landfilling is performed by leaving a shallow water depth below the current level of the pond to be abolished. 4. The method for maintaining and managing a pond according to claim 1, 2 or 3, wherein the improvement of the spillway is minimized and the existing flood amount is not changed. 5. In order to improve the drainage on the landfill surface of the abandoned pond, a spillway is provided in the spillway to drain a small amount of inflowing water, and a flood volume corresponding to the increase in the flood volume due to the spillway is provided. The method for maintaining and managing a pond according to claim 4, wherein the width of the existing spillway is reduced to minimize the improvement of the spillway in order to reduce it. 6. A small drainage channel is installed so that the small inflow that constantly flows in is below the landfill surface when the landfill surface is above the current level of the abandoned pond, and a spillway is provided with a cutout. The basin of claim 4, wherein the width of the existing spillway is reduced and the height of the spillway is increased to the landfill surface in order to reduce the increase in the amount of flood caused by the spillway, thereby minimizing the improvement of the spillway. Maintenance and management method. 7. A drainage channel is installed so that the small inflow is always below the landfill surface when the landfill surface is below the current level of the abandoned pond. Maintaining the pond according to claim 4, wherein the width of the existing spillway is reduced to reduce the increase in flood due to the cutout, and the height of the spillway is lowered to the landfill surface to minimize the improvement of the spillway. Management method. 8. When the downstream drainage channel of the abandoned reservoir is not yet developed, the reservoir landfill method according to any one of claims 1 to 7 is adopted, and the abandoned reservoir is completely landfilled after the downstream drainage is completed. A method of maintaining and managing a basin that gradually reclaims it. 9. A method for maintaining and managing a pond in which a pipe is drawn from the integrated pond to the abandoned pond so that water in the abandoned pond will not be hindered in maintenance and management including consolidation and abolition of the pond. 10. The method for maintaining and managing a pond according to claim 9, wherein a pipe is drawn to the abandoned pond other than the same catchment water system as the integrated pond so that water in the abandoned pond is not hindered. 11. The method for maintaining and managing a reservoir according to claim 9 or 10, wherein water is supplied to the abandoned reservoir from the integrated reservoir to the abandoned reservoir in an integrated manner so that water in the abandoned reservoir is not hindered. 12. The method for drawing water from an upstream integrated reservoir to a downstream abandoned reservoir so as to integrally carry out water supply so that water in the downstream abandoned reservoir is not hindered. Maintenance method of the pond. 13. The method of drawing a pipe from an integrated reservoir on the downstream side to an abandoned reservoir on the upstream side and sending water by a pump in an integrated manner so that water in the upstream abandoned reservoir is not hindered. Or 11 ways to maintain and manage the pond. 14. A method for maintaining and managing a reservoir, which comprises pipe-conducting water from an abandoned reservoir to an integrated reservoir in the maintenance and management including consolidation and abolition of the reservoir. 15. The method for maintaining and managing a pond according to claim 14, wherein a pipe is drawn from the basin of the abandoned pond to the integrated pond and pumped up to collect water. 16. A method for maintaining and managing a pond, which is used as a material for agricultural infrastructure maintenance by mixing a solidifying agent with sludge generated at a water source in the maintenance and management including integration and abolition of the pond. 17. The method for maintaining and managing a pond according to claim 16, wherein the sludge generated in the water source is mixed with a solidifying agent and used as a material for the maintenance of an agricultural base in the same water system. 18. The method for maintaining and managing a pond according to claim 16, wherein the sludge generated in the water source is mixed with a solidifying agent and used as a material for slope protection of the water source facility. 19. The method for maintaining and managing a pond according to claim 16, 17 or 18, wherein sludge mixed with a solidifying agent is used for pickling in a slope protection law frame. 20. The method for maintaining and managing a pond according to claim 16 or 17, wherein the sludge generated in the water source is mixed with a solidifying agent to provide a water stop layer inside the slope protection to prevent water leakage. 21. The method for maintaining and managing a pond according to claim 18, wherein sludge mixed with a solidifying agent is used as slope protection in a waterside embankment for water purification by a water source plant. 22. The method for maintaining and managing a pond according to claim 18 or 20, wherein sludge mixed with a solidifying agent is used as slope protection on a ridge for water quality purification by a water source plant. 23. A sludge mixed with a solidifying agent is used for slope protection and grass control for the construction of a ridge of a paddy field.
How to maintain and manage one of the reservoirs. 24. The method for maintaining and managing a pond according to claim 16 or 17, wherein the sludge mixed with a solidifying agent is used for slope protection and grass control for the construction of a ridge of a field. 25. The method for maintaining and managing a pond according to claim 16 or 17, wherein a sludge mixed with a solidifying agent is used for roadbed work to prevent plant roots from entering. 26. A vegetation control embankment is prepared by mixing a sludge generated in a water source with a solidifying agent.
How to maintain and manage one of the reservoirs. 27. The method for maintaining and managing a pond according to claim 16, wherein aggregates are mixed with the solidifying agent-mixed sludge to prolong the service life of slope protection. 28. The frictional resistance value of the surface is increased by mixing the aggregate with the solidifying agent-containing sludge.
5 Reservoir maintenance method. 29. The method for maintaining and managing a pond according to claim 16, 17 or 25, wherein aggregate is sprinkled on the roadbed of the solidifying agent-containing sludge to carry out compaction to increase the frictional resistance value of the surface.