CN107180304A - A kind of the water source area along the river evaluation method based on the amount of taking by surprise - Google Patents
A kind of the water source area along the river evaluation method based on the amount of taking by surprise Download PDFInfo
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Abstract
The invention discloses a kind of the water source area along the river evaluation method based on the amount of taking by surprise, including first evaluating regional groundwater resources amount along the river, then groundwater resources amount level of ground water linkage model is set up by groundwater Numerical Simulation technology, it is final to set up the Water Resource Adjustment And Control amount groundwater level the water source area along the river recovery well amount of taking by surprise correlation computations relation formula along the river, realize and take by surprise rate of stream flow progress quantitative analysis along the river to proposed water source project with evaluating using based on numerical simulation technology coupling Simpson formula first, there is application and promotion prospect well based on the technical method in the evaluation of groundwater resources.
Description
Technical field
Commented the present invention relates to Evaluation of Groundwater Resources technical field, more particularly to a kind of the water source area along the river based on the amount of taking by surprise
Valency method.
Background technology
Underground water is the important component of water resource, is whole water supply resource and the important support of the ecosystem, still,
When carrying out some engineering constructions or production of resources, the storage and supply of water resource can be all had influence on.
In order to which the water intaking for reasonably carrying out water resource is supplied, it is necessary to carrying out proposed water source work in river course or near river course
Journey water intake well, while long-term exploiting groundwater, reduces groundwater level, and benefit of the river to underground water is added indirectly
To amount, this increased increment is referred to as take by surprise amount of the pumped well to river, that is, exploits pumped well and the surface river water amount of taking by surprise is accounted for
The ratio (taking by surprise rate) of pumped well design exploitation water takes by surprise the size of rate, depends primarily on the aqueous of section residing for the pumped well
Water and pumping duration are exploited in coefficient of pressure conductivity, pumped well and the relative position of streamflow, the design of pumped well of layer.And
In a certain fixed section, then pumped well is depended primarily on from a distance from streamflow and pumping duration, rate is reasonably taken by surprise, can
The rational quantitative analysis for carrying out water resource exploitation, the sufficient supply at holding water source, therefore water resource is extremely to have with evaluation
It is necessary.
The content of the invention
For drawbacks described above or deficiency, it is an object of the invention to provide a kind of the water source area along the river evaluation based on the amount of taking by surprise
Method.
The technical scheme is that：
A kind of the water source area along the river evaluation method based on the amount of taking by surprise, including：
1), according to the ground water regime three-dimensional geological conceptual model and actual state of local ground watering resource to be evaluated,
Local ground watering stream mathematical modeling to be evaluated is set up, it is determined that exploitation position；
2) pumped well design discharge, is formulated, define pumped well takes by surprise rate calculation formula：
In formula：Take by surprise rate P (u)-water head site and take by surprise rate of stream flow WRiverWith yield WOpenRatio；Q-pumped well design stream
Amount；Q '-pumped well takes by surprise the increase flow of river；A-water head site hydraulic conductivity coefficient；T-pumping duration；
X0Distance of-water head site the hopper centre away from river waterside；The section of y-Pumping water influence is long；
3), according to local ground watering stream mathematical modeling to be evaluated and Simpson formula, drawRelation is bent
Line chart；
4), by the proposed water head site retaining issue of actual acquisition according to, take by surprise rate calculation formula andClose
It is curve map, obtains the amount of taking by surprise WRiver, according to taking the amount of taking by surprise WRiverProposed water source project and water resource are carried out quantitative analysis with
Evaluate.
The step 2) in t values determination：The next continuous decrease in continuous pumpage and ground, t is from starting to draw water to calculating
Moment is lasted；Interval is when drawing water or when increment causes the level of ground water to go up more than yield, t=t1+ti, t1Taken out to be previous
Level of ground water is gone up pumping duration used during to a certain height, t after wateriFor subsequent period pumping duration.
The step 3) specifically include：Change yield W in local ground watering stream mathematical modeling to be evaluatedOpen, according to attacking
Take rate calculation formula acquisition water head site by force and take by surprise rate of stream flow WRiver, and take by surprise rate P (u)；Drawn finally according to Simpson formula Graph of relation.
The step 4) be specially：Determine water head site hopper centre away from river waterside apart from X0Value, pumping duration t, contain
The hydraulic conductivity coefficient a of water layer, then calculating the n-thth day u valuesFinally look intoGraph of relation is tried to achieve
Rate is taken by surprise, substitute into pumped well takes by surprise the rate calculation formula reverse amount of taking by surprise WRiver。
The mathematical model of groundwater flow：
In formula：H --- underground water head；Kx, Ky, Kz- x, y, z direction infiltration coefficient；K-boundary normal direction infiltration system
Number；SSCompare coefficient of storage in-water-bearing layer；H0The initial head in-water-bearing layer；The class border units area cross-section of river of q-water-bearing layer two is mended
To flow；The unit exterior normal direction on n-vadose region border, vector；ε-source sink term intensity；Г-simulated domain Equations of The Second Kind side
Boundary；Ω-the flow domain.
Compared with the prior art, beneficial effects of the present invention are：
The invention provides a kind of the water source area along the river evaluation method based on the amount of taking by surprise, pass through groundwater Numerical Simulation technology
Set up groundwater resources amount-level of ground water linkage model, it is final to set up along the river that Water Resource Adjustment And Control amount-groundwater level-is along the river
The water head site recovery well amount of taking by surprise correlation computations relation formula, realizes and couples Simpson formula using based on numerical simulation technology first
Take by surprise rate of stream flow along the river to proposed water source project and carry out quantitative analysis with evaluating, have in the evaluation of groundwater resources fine
Application and promotion prospect.
Brief description of the drawings
Fig. 1 is the present inventionCurve map；
Fig. 2 is the present inventionCurve map.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawings.
The invention provides a kind of the water source area along the river evaluation method based on the amount of taking by surprise, including：
1), according to the ground water regime three-dimensional geological conceptual model and actual state of local ground watering resource to be evaluated,
Local ground watering stream mathematical modeling to be evaluated is set up, it is determined that exploitation position；
According to simulation region ground water regime groundwater resource evaluation, mathematical model of groundwater flow in calculating area is established.
When not considering aquiclude water storage capacity, the mathematical modeling of shallow-layer diving and artesian water system ground water movement is generalized as three-dimensional
Flow instabilities system, its mathematical modeling is as follows：
In formula：
H --- underground water head (m)；
Kx, Ky, Kz--- x, y, z direction infiltration coefficient (m/d)；
K --- boundary normal direction infiltration coefficient (m/d)；
SS--- compare coefficient of storage in water-bearing layer；
H0--- the initial head (m) in water-bearing layer；
The class border units area cross-section of river make-up flow (m of q --- water-bearing layer two2/d)；
The unit exterior normal direction on n --- vadose region border, vector；
ε --- source sink term intensity (including mining rate, permeability model, evaporation intensity etc.) (1/d)；
Г --- simulated domain Equations of The Second Kind border；
Ω --- the flow domain.
By setting up the three-dimensional groundwater flow numerical model of this area, to the underground under the conditions of different recovery of subterranean waters
Water level carries out simulation and forecast, sets up dependency relation therebetween, is that the calculating of the next step the water source area along the river well amount of taking by surprise is built
Vertical numerical relation deposit.
2) pumped well design discharge, is formulated, pumped well is defined and takes by surprise rate calculation formula, when pumped well is nearer from river bank,
And when water table and the river of pumped well exploitation have direct hydraulic connection, pumped well is taken by surprise rate and can calculated with following formula
Formula：
In formula：P (u)-water head site takes by surprise rate of stream flow WRiverWith yield WOpenRatio (taking by surprise rate)；
Q-pumped well design discharge；
Q '-pumped well takes by surprise the increase flow of river；
A-water head site hydraulic conductivity coefficient, m2/d；
T-pumping duration, d；
X0Distance of-water head site the hopper centre away from river waterside, m；
The section of y-Pumping water influence is long, m.
From formula as can be seen that the principal element that rate of stream flow is taken by surprise in influence isWith yield WOpen。
Wherein, the determination of parameter：
(1)X0The determination of value
This water head site is most of all inside major river bed due to recovery well, and the retaining phase is submerged, and vertically enters in surface river water
In the case of impregnation is given, this calculating take reference collapse the dam phase exploitation gang of wells under the conditions of maximum effect radius value half, be used as group
Distance of the analogy hopper centre away from river waterside that gang of wells is adopted.
(2) determination of t values
The next continuous decrease in continuous pumpage and ground, t is from starting to draw water to calculating lasting for moment；Interval when drawing water or
When increment causes the level of ground water to go up more than yield, t=t1+ti, t1Go up for level of ground water after previous draw water to a certain height
Pumping duration used, t when spendingiFor subsequent period pumping duration.
(3) determination of a values
A values are the hydraulic conductivity coefficient in water-bearing layer；
3), according to local ground watering stream mathematical modeling to be evaluated and Simpson formula, as shown in figure 1, drawingGraph of relation；Specifically include：Change yield W in local ground watering stream mathematical modeling to be evaluatedOpen, root
Rate of stream flow W is taken by surprise according to rate calculation formula acquisition water head site is taken by surpriseRiver, and take by surprise rate P (u)；Drawn finally according to Simpson formulaGraph of relation.
Daily production WOpenFor constant, X0, a, t, be known parameters, because the water source area along the river takes by surprise the differential equation of rate of stream flow
FormulaCan not direct solution.Simpson has tried to achieve one with mathematics solutionRelation curve, for certain
One section water-bearing layer a values can use constant, then P (u) is with X0Increase and strongly reduce, increased dramatically with t growth.
4), by the proposed water head site retaining issue of actual acquisition according to, take by surprise rate calculation formula andClose
It is curve map, obtains the amount of taking by surprise WRiver, according to taking the amount of taking by surprise WRiverProposed water source project and water resource are carried out quantitative analysis with
Evaluate.
Specially：Determine water head site hopper centre away from river waterside apart from X0Value, pumping duration t, the water level in water-bearing layer
Coefficient of conductivity a, then calculating n-th day u valuesFinally look intoGraph of relation tries to achieve the rate of taking by surprise, and substitution is taken out
Well takes by surprise the rate calculation formula reverse amount of taking by surprise WRiver。
Exemplary：
Proposed water head site is as follows in rubber dam retaining phase design exploitation situation：X0=116m, a=1333m2/d.Ask and take out respectively
The 1st day of water, the 2nd day, the 3rd day ... the u values of n-th dayLook intoRelated figure tries to achieve the rate of taking by surprise, and substitutes into
The formula reverse amount of taking by surprise WRiver。
1. example solves:The calculating for taking by surprise rate on 1st day：
Look intoRelated figure, which is tried to achieve, takes by surprise rate P (u)=12%；
2. example solves:The calculating for taking by surprise rate on 2nd day：
Look intoRelated figure, which is tried to achieve, takes by surprise rate P (u)=23%；
By that analogy, water head site is inquired into and under the conditions of design yieldDependency relation curve such as
Shown in Fig. 2, calculated value is as shown in table 1：
Table 1Calculate assay value table
From table 1, Fig. 2, proposed getting water from water head site well is in continuous exploit the 14th day, and the 83% of its gross amount of water resources
From in the amount of taking by surprise of surface river water, it can thus be appreciated that under conditions of water-bearing layer tax outlet capacity is certain, proposed water head site is exploited for a long time
Under the conditions of its exploit water more than 80% come from surface river water Vertical Infiltration amount.
This method research is entered based on the water source area along the river amount of the taking by surprise computational methods that numerical simulation technology couples Simpson formula
Row is evaluated, realized by using GMS numerical simulation technology softwares carried out in research area the levels of ground water of groundwater resources with
The associated change relation research of groundwater resources amount, then set up on the basis of thisCorrelogram, most
The amount of taking by surprise W is drawn eventuallyRiverWithWOpenBetween there is fixed functional relation, the functional relation is asked with Simpson with mathematics solution
Relation curve has height fit correlation, therefore couples Simpson formula pair using based on numerical simulation technology
Proposed water source project takes by surprise rate of stream flow and carries out quantitative analysis with evaluating along the river.Practical application shows based on the technical method on ground
There is application and promotion prospect well in the evaluation of lower water resource.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (5)
1. a kind of the water source area along the river evaluation method based on the amount of taking by surprise, it is characterised in that including：
1), according to the ground water regime three-dimensional geological conceptual model and actual state of local ground watering resource to be evaluated, set up
Local ground watering stream mathematical modeling to be evaluated, it is determined that exploitation position；
2) pumped well design discharge, is formulated, define pumped well takes by surprise rate calculation formula：
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In formula：Take by surprise rate P (u)-water head site and take by surprise rate of stream flow WRiverWith yield WOpenRatio；Q-pumped well design discharge；
Q '-pumped well takes by surprise the increase flow of river；A-water head site hydraulic conductivity coefficient；T-pumping duration；X0—
Distance of the water head site hopper centre away from river waterside；The section of y-Pumping water influence is long；
3), according to local ground watering stream mathematical modeling to be evaluated and Simpson formula, drawGraph of relation；
4), by the proposed water head site retaining issue of actual acquisition according to, take by surprise rate calculation formula andRelation is bent
Line chart, obtains the amount of taking by surprise WRiver, according to taking the amount of taking by surprise WRiverQuantitative analysis is carried out with evaluating to proposed water source project and water resource.
2. the water source area along the river evaluation method according to claim 1 based on the amount of taking by surprise, it is characterised in that the step 2)
The determination of middle t values：The next continuous decrease in continuous pumpage and ground, t is from starting to draw water to calculating lasting for moment；Interval is drawn water
When or increment when causing the level of ground water to go up more than yield, t=t1+ti, t1Go up for level of ground water after previous draw water to certain
Pumping duration used, t during one heightiFor subsequent period pumping duration.
3. the water source area along the river evaluation method according to claim 1 based on the amount of taking by surprise, it is characterised in that the step 3)
Specifically include：Change yield W in local ground watering stream mathematical modeling to be evaluatedOpen, water is obtained according to rate calculation formula is taken by surprise
Take by surprise to source rate of stream flow WRiver, and take by surprise rate P (u)；Drawn finally according to Simpson formulaGraph of relation.
4. the water source area along the river evaluation method according to claim 1 based on the amount of taking by surprise, it is characterised in that the step 4)
Specially：Determine water head site hopper centre away from river waterside apart from X0Value, pumping duration t, the hydraulic conductivity coefficient in water-bearing layer
A, then calculating the n-thth day u valuesFinally look intoGraph of relation tries to achieve the rate of taking by surprise, and substitutes into pumped well
Take by surprise the rate calculation formula reverse amount of taking by surprise WRiver。
5. the water source area along the river evaluation method according to claim 1 based on the amount of taking by surprise, it is characterised in that the underground water
Flow mathematical modeling：
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In formula：H --- underground water head；Kx, Ky, Kz- x, y, z direction infiltration coefficient；K-boundary normal direction infiltration coefficient；
SSCompare coefficient of storage in-water-bearing layer；H0The initial head in-water-bearing layer；The class border units area cross-section of river supply of q-water-bearing layer two
Flow；The unit exterior normal direction on n-vadose region border, vector；ε-source sink term intensity；Г-simulated domain Equations of The Second Kind border；
Ω-the flow domain.
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Cited By (4)
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| CN110222601A (en) * | 2019-05-22 | 2019-09-10 | 南京泛在地理信息产业研究院有限公司 | A kind of river piracy automatic identifying method |
| CN111680424A (en) * | 2020-06-11 | 2020-09-18 | 南京师范大学 | River attack automatic discrimination method based on x-shaped graphic state characteristics |
| CN111709598A (en) * | 2020-04-28 | 2020-09-25 | 中国地质调查局南京地质调查中心(华东地质科技创新中心) | Multi-field coupling model-based underground water system environment capacity evaluation method |
| CN111859257A (en) * | 2020-07-28 | 2020-10-30 | 长沙理工大学 | Method for determining position of mountain beach saturation line in non-uniform fluctuation process of water level |
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| CN111680424A (en) * | 2020-06-11 | 2020-09-18 | 南京师范大学 | River attack automatic discrimination method based on x-shaped graphic state characteristics |
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