Method of control of operation of drainage system

FIELD: agriculture.

SUBSTANCE: method comprises lying the drain system with the converging drains on the control section, making observation gates within the converging drains, observing the parameters of the operation of the drain system, and comparing the parameters with the permissible values. The drains are provided with mouth and source sections of parallel drains. The lengths of the source and mouth sections of the parallel drains are chosen to be no less than the half of maximum distances between the sources and mouths of the converging drains, respectively.

EFFECT: enhanced precision of control.

1 cl, 1 dwg

 

The present invention relates to the field of agriculture and forestry, and specifically to methods of control of the drainage network.

There are many methods of control and drainage systems, are described in the following sources: Eggelsmann R. Guide to drainage. M.: Kolos, 1978, p.223 and Methods of field research on drainage drainage. Edited Bespalova. M. Kolos, 1983, s-123.

The disadvantage of this method of control is the increased complexity caused by the need for regular monitoring of meliorative regime drained and mode settings drainage works on several observation areas with different intensity drainage.

The closest in technical essence and purpose of the proposed technical solution is the method of control of the drainage network, including the gasket on the control plot drainage network from converging drains, the breakdown of the Supervisory sites, monitoring the performance of the drainage network, comparing them with valid values, AS described in the USSR 1341333 class. E 02 In 11/00, published 30.01.89, bull. No. 4.

The disadvantage of this method of control is the increased measurement error in Itokawa and wellhead monitoring sites, which is caused by groundwater inflow from pile the surrounding territory in the area of the headwaters drain and outflow of groundwater in the surrounding area of the area mouths of drains.

The aim of the invention is to improve the accuracy of control by eliminating the groundwater inflow to the area of control and exhaust them outside.

This goal is achieved by the fact that from the beginning and mouths converging drain further pave the estuary and ishikawae segments parallel to each other drains, and Supervisory sections break within converging drains. The length of the estuarine segments drains shall be taken not less than half the largest distance between the mouths of the converging drains and length stokovyh segments drains shall be taken not less than half the largest distance between the sources converging drain.

The proposed technical solution is characterized by the following set of essential features:

1. The gasket on the control plot drainage network from converging drains.

2. The breakdown of the Supervisory sections.

3. Monitoring the performance of the drainage network.

4. Comparison of the performance of the drainage network with valid values.

and distinguishing features:

5. From the origins and mouths converging drain further pave the estuary and ishikawae segments parallel to each other drains, and Supervisory sections break within converging drain.

6. The length of the estuarine segments drains shall be taken not less than half the largest distance between the mouths of the converging drain Elina stokovyh segments drains shall be taken not less than half the largest distance between the sources converging drain.

This set of essential features sufficient, and each of them is necessary to achieve the objectives of the invention.

Converging tracks on a single observation site create different intensity of drainage typical of different areas drained array. Eliminates the need for multiple device sections with parallel drains and different drain spacing. The breakdown of the Supervisory alignments captures measurement of soil moisture and groundwater levels under different intensities drainage. The Supervisory alignments smash mouth, stokovoj and Central parts of the converging drains. The intensity of drainage in the wellhead below target, the Central target are the same and Itokawa the target higher than in the drained area. Thus, a plot of observations simulates all possible changes in the intensity of drainage pattern drainage. In the middle part of mitrani in the Supervisory ten sites record the soil moisture. The soil moisture values are compared with the allowable values. If the Central target soil moisture corresponds to a predetermined humidity level, then the calculated drain distance on the array draining correctly selected and drainage works satisfactorily. If the soil moisture in estochowa the target corresponds to sedanomaria, the drainage intensity on the array drainage underestimated. If soil moisture in the wellhead target matches the given value, the intensity of drainage on the array drainage inflated.

The disadvantage of this method of control is the increased measurement error in Itokawa and wellhead monitoring sites. In the area of the convergent origins of drains from the adjacent territory enters the groundwater flow that creates the control error. From the area mouths converging drain on the surrounding area enters the groundwater flow, which also generates a control error. Laying additional parallel estuarine and stokovyh segments drains eliminates the formation of additional groundwater flows, which increases the accuracy of measurements at the observation sites.

The length of the segments drains shall be taken not less than one-half the largest distance in the upper reaches and estuaries converging drains. Half the largest distance corresponds to the length of a path filtering, where the magnitude of groundwater flow can be neglected. The increase of the lengths stokovyh and estuarine segments parallel drains over half of the largest distance between the sources and the mouths of the converging drains increase the cost of the device control plot without significant improvement in the accuracy of control. The mind is isenia their lengths reduces the accuracy of the control.

The method explains the drawing. The drawing shows a plan of the control plot. On the control plot pave the collector 1 and converging drains 2, which supply stokovye lines parallel drains 3 and a solitary line segments parallel drains 4. Across converging drain 2 break Supervisory alignments 5.

Collector and drains on the control plot structurally identical drainage network just drained array. Drains made of pottery or plastic tube with a diameter of not less than 50 mm Diameter collector pipes determined by hydraulic calculation.

Drain spacing between the converging slopes drains vary from 0.5 to 1.5 from the calculated distance on the array drainage. Drain the distance in the middle part of the plot is equal to the calculated drain spacing on the array drainage. On the area across the drains mark of at least three observation sites. One in the middle part of the converging drains, two on their ends. Increasing the number of sites over 7 dramatically increases the complexity of control without a significant increase in the accuracy of observations.

The method is implemented as follows. Simultaneously with the construction or reconstruction of drainage on the array drainage satisfied with the control plot. Lay the manifold converging drains, ishikawae and estuarine segments parallel Dreux is. Length stokovyh segments drains shall be taken not less than half the largest distance between the sources converging drains. The length of the estuarine segments parallel drains shall be taken not less than half the largest distance between the mouths of the converging drains. The collector within the control plot dampproof. Across converging drain break at least three observation sites. One target in the middle part of the converging drains and two other target on their ends. The cross-sections of terrain fix hidden frames and duplicate milestones.

In the middle parts of mitrani Supervisory ten sites measure the humidity of the active layer of the soil. The soil moisture values are compared with predetermined values. If soil moisture in the Central target coincides with the preset value, then the calculated distance between the drains on the array drainage chosen correctly. If the soil moisture in estochowa the target coincides with the preset value, then the calculated distance between the drains on the array drainage inflated. If soil moisture in the wellhead target coincides with the preset value, then the calculated distance between the drains on the array drainage underestimated.

The method is implemented in the Moscow region. During the reconstruction of the drainage network in the area of 250 hectares was arranged control plot with a bookmark collector and four converging drains, SN is brennah stokovye and a solitary line segments parallel drains. The length of drains 100-120 m tile Diameter, 75 mm In the control plot were divided into three Supervisory target. One in the middle part of the converging drains, and two on their ends. The distance between the converging drains ranged from 7.5 m in estochowa the target up to 22.5 m in wellhead target. The maximum distance between the sources converging drain was 7 meters Maximum distance between the mouths of the converging drain was 29 meters In the Central target, the distance between the drains is 15 m It coincides with the estimated distance between parallel drains on the array drainage. Length stokovyh segments parallel drains - 4 m Length of the estuarine segments parallel drains - 15 m array drainage and the control plot were grown cabbage. All previous work on the control plot and the array of drainage did not differ.

Each decade recorded the humidity of the active soil layer in the middle part of mitrani located in the observation sites. Average during the growing season the soil moisture values in fractions of the smallest capacity in river sites were: Central - 0.7 HB, mouth - 0.85 NV, source logic is referred to 0.65 NV. The set humidity value was 0.7 HB. Set value of soil moisture coincides with the amount of humidity in the Central target. This shows that the calculated drain distance on the array drainage accepted PR is Vilna.

To evaluate the proposed method on this array drainage was built section by the method similar with converging drains without stokovyh and estuarine segments parallel drains, and two sections with parallel drains, which were adopted for the base. On the same plot with parallel drains drain distance was 7.5 m, on the other 22.5 m At all sites each decade recorded the humidity of the active layer of the soil. Average during the growing season the amount of soil moisture at site-analog amounted to: Central target - 0.7 HB, mouth - 0.79 HB, source logic is referred to 0.69 NV. For base stations with parallel drains in between 7.5 m soil moisture was 0.65 HB, when the between 22.5 m - 0.84 HB.

The mode settings of the drainage network at the observation sites of the proposed control plot and plots with parallel drains were practically identical. The mode settings of the drainage network in the extreme sections of the site-analogue and base sections with parallel drains are significantly different. In estochowa the target area similar to the average soil moisture in the active layer of the soil was higher by 0.04 HB average soil moisture at a basic plot with parallel drains and drain distance of 7.5 m, wellhead target is below 0.05 HB average soil moisture at a basic plot with parallel drains and Midr is authorized by a distance of 22.5 m

Thus, the proposed control method to improve the accuracy of measurements at the observation sites at 0.05 HB due to device stokovyh and estuarine segments parallel drains, ensuring elimination of outflow and inflow of groundwater from adjacent areas on the control plot.

1. The control method of the drainage network, including the gasket on the control plot drainage network from converging drains, the breakdown of the Supervisory sites, monitoring the performance of the drainage network, comparing them with valid values, characterized in that from the beginning and mouths converging drain further pave the estuary and ishikawae segments parallel to each other drains, and Supervisory sections break within converging drain.

2. The control method under item 1, characterized in that the length of the estuarine segments drains shall be taken not less than half the largest distance between the mouths of the converging drains and length stokovyh segments drains shall be taken not less than half the largest distance between the sources converging drain.



 

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EFFECT: enhanced precision of control.

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EFFECT: reduced labor consumptions.

1 dwg

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