CN105547957B - Soil bacterial diversity wetted front suction and rainfall spurt volume computational methods - Google Patents
Soil bacterial diversity wetted front suction and rainfall spurt volume computational methods Download PDFInfo
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- CN105547957B CN105547957B CN201510917405.6A CN201510917405A CN105547957B CN 105547957 B CN105547957 B CN 105547957B CN 201510917405 A CN201510917405 A CN 201510917405A CN 105547957 B CN105547957 B CN 105547957B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
- G01N15/0893—Investigating volume, surface area, size or distribution of pores; Porosimetry by measuring weight or volume of sorbed fluid, e.g. B.E.T. method
Abstract
A kind of soil bacterial diversity wetted front suction and rainfall spurt volume computational methods, comprise the following steps：Tested by double-ring infiltration, measure and record water-supply quantity with the change for infiltrating the time, calculate real-time progressive infiltration capacity；Based on infiltrating time and real-time progressive infiltration capacity, call parameter is fitted；Based on fitting parameter and fixed infiltration head height, wetted front suction is calculated；Based on fitting parameter, soil initial moisture and soil porosity, saturated hydraulic conductivity in soil is calculated；Based on wetted front suction, saturated hydraulic conductivity in soil, rainfall intensity, soil initial moisture and soil porosity, rainfall spurt volume is calculated.
Description
Technical field
It is more particularly to a kind of based on double-ring infiltration this disclosure relates to the soil parameters of hydrology rainfall-runoff model determines
Soil bacterial diversity wetted front suction and rainfall spurt volume computational methods.
Background technology
China is one of country that storm flood most takes place frequently, and forecasting and warning promptly and accurately is carried out to flood damage for drop
Low casualty loss is particularly significant.One of key issue of flood damage forecasting and warning is accurate simulation play Rainfall-runoff process.
Green-Ampt models are physical mechanism clearly Runoff Models, but its wetted front fixed suction parameter is difficult to determine, seriously
Limit the application of the model.Traditional double-ring infiltration experiment is merely capable of testing soil saturated hydraulic conductivity, can not determine
Wetted front fixed suction parameter in Green-Ampt models, it is difficult to meet that Green-Ampt models are applied to basin water literature pair
The demand of soil parameters.Therefore, there is an urgent need for a kind of reliable and practical method, the moistening in Green-Ampt models can quickly be calculated
Peak fixed suction parameter and rainfall spurt volume.
The content of the invention
In order to make up the missing of the prior art, the disclosure provides a kind of soil bacterial diversity wetted front suction and rainfall initial abstraction gauge
Calculation method.
The disclosure uses solution below：
A kind of soil bacterial diversity wetted front suction and rainfall spurt volume computational methods, comprise the following steps：
Step 1：Tested by double-ring infiltration, measure and record water-supply quantity Q with the change for infiltrating time t, according to formula
(1) real-time progressive infiltration capacity h is calculated：
Wherein, S represents the inner ring area of the double-ring infiltration instrument used；
Step 2：Time t and real-time progressive infiltration capacity h are infiltrated based on described, according to formula (2) fitting parameter A and parameter B：
Step 3：Wetted front suction h is calculated according to formula (3)f：
hf=B-h0 (3)
Wherein, h0Represent fixed infiltration head height；
Step 4：Saturated hydraulic conductivity in soil K is calculated according to formula (4)：
Wherein, θ0Represent soil initial moisture, θsRepresent soil porosity；
Step 5：Rainfall spurt volume I is calculated according to formula (5)a：
Wherein, P represents rainfall intensity.
Preferably, soil porosity θ described in cutting ring sampling and measuring is passed throughs。
Preferably, soil initial moisture θ described in soil moisture content measurements determination is passed through0。
Preferably, parameter A described in least square fitting and parameter B is passed through.
Preferably, the water-supply quantity Q is the water of water supply Markov bottle.
The beneficial effect of the disclosure is to calculate soil bacterial diversity wetted front suction and rainfall spurt volume based on double-ring infiltration, can
Rapidly and accurately determine the soil parameters involved by Green-Ampt models, and then carry out flood damage forecasting and warning.
Brief description of the drawings
Disclosure exemplary embodiment is described in more detail in conjunction with the accompanying drawings, the disclosure it is above-mentioned and other
Purpose, feature and advantage will be apparent, wherein, in disclosure exemplary embodiment mode, identical reference number
Typically represent same parts.
Fig. 1 shows the stream of soil bacterial diversity wetted front suction and rainfall spurt volume computational methods accoding to exemplary embodiment
Cheng Tu；
Fig. 2 shows curve map of the infiltration capacity with infiltrating the time accoding to exemplary embodiment.
Embodiment
Preferred embodiment of the present disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in attached drawing
Preferred embodiment, however, it is to be appreciated that may be realized in various forms the disclosure without should be limited by embodiments set forth here
System.On the contrary, these embodiments are provided so that the disclosure is more thorough and complete, and can be complete by the scope of the present disclosure
Ground is communicated to those skilled in the art.
Fig. 1 shows the stream of soil bacterial diversity wetted front suction and rainfall spurt volume computational methods accoding to exemplary embodiment
Cheng Tu, this method comprise the following steps：
Step 1, tested by double-ring infiltration, measure and record water-supply quantity Q with the change for infiltrating time t, according to following
Formula (1) calculates real-time progressive infiltration capacity h：
Wherein, S represents the inner ring area of the double-ring infiltration instrument used.
In actual practice it is preferred to double-ring infiltration experiment is carried out using double-ring infiltration instrument.Double-ring infiltration instrument is in this area
The equipment that common measurement water penetrates into the seepage velocity of soil.The double-ring infiltration instrument of standard includes the different outer shroud of diameter and interior
Ring.When vertical infiltration current are to edge, outer shroud can play the role of isolation.Since the water in inner ring is perpendicular flow, because
And measure and be only limitted to carry out in inner ring.
As a preferred embodiment, using Markov bottle as supply equipment, therefore water-supply quantity Q refers to water supply Markov bottle
Water, when using other supply equipments, the water of supply equipment used by water-supply quantity Q refers to.
Step 2, based on time t and real-time progressive infiltration capacity h is infiltrated in step 1, according to the following formula (2), fitting ginseng
Number A and parameter B：
During actual implementation, general data processing can be prepared a computer program or utilized by least square method
Software (such as TableCurve 2D), fitting parameter A and parameter B.
Step 3, wetted front suction h is calculated according to the following formula (3)f：
hf=B-h0 (3)
Wherein, h0Represent fixed infiltration head height.
Step 4, saturated hydraulic conductivity in soil K is calculated according to the following formula (4)：
Wherein, θ0Represent soil initial moisture, can be measured by soil moisture content test, θsRepresent soil porosity,
It can be measured by cutting ring sampling.
Step 5, rainfall spurt volume I is calculated according to the following formula (5)a：
Wherein, P represents rainfall intensity.According to practical application, P can be measured by rainfall gauge or the drop of design
Raininess degree.
Using example
This example provides a kind of soil bacterial diversity wetted front suction and rainfall initial abstraction gauge based on the experiment of field double-ring infiltration
Calculation method, comprises the following steps：
Step 1：Double-ring infiltration experiment is carried out, with 1 second for the sampling period, utilizes the connection computer serial port measurement of hanging electronic scale
And the water for recording water supply Markov bottle calculates real-time progressive infiltration capacity h according to formula (1), obtains with the change for infiltrating time t
Real-time progressive infiltration capacity h and the curve map for infiltrating time t are as shown in Figure 2.
Step 2：Based on the real-time progressive infiltration capacity h in step 1 and the data for infiltrating time t, according to formula (2), pass through
Parameter A and parameter B in least square fitting formula (2), obtain A=32.45s/cm, B=25.91cm, R2=0.9997,
Wherein R2Represent that fitting determines coefficient.
Step 3：Measurement is fixed infiltration head height h0=10cm, wetted front suction h is calculated according to formula (3)f=
15.91cm。
Step 4：Measurement is tested by soil moisture content and obtains soil initial moisture θ0=0, measured by cutting ring sampling
Soil porosity θs=36%, saturated hydraulic conductivity in soil K=399.22mm/hr is calculated according to formula (4).
Step 5：Rainfall spurt volume is calculated according to formula (5)：
Above-mentioned technical proposal is a kind of embodiment of the present invention, for those skilled in the art, in this hair
It is bright disclose application process and principle on the basis of, it is easy to make various types of improvement or deformation, be not limited solely to this hair
The bright described method of above-mentioned specific embodiment, therefore previously described mode is simply preferable, and it is not restrictive
Meaning.
Claims (5)
1. a kind of soil bacterial diversity wetted front suction and rainfall spurt volume computational methods, it is characterised in that comprise the following steps：
Step 1：Tested by double-ring infiltration, measure and record water-supply quantity Q with the change for infiltrating time t, counted according to formula (1)
Calculate real-time progressive infiltration capacity h：
<mrow>
<mi>h</mi>
<mo>=</mo>
<mfrac>
<mi>Q</mi>
<mi>S</mi>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, S represents the inner ring area of the double-ring infiltration instrument used；
Step 2：Time t and real-time progressive infiltration capacity h are infiltrated based on described, according to formula (2) fitting parameter A and parameter B：
<mrow>
<mfrac>
<mi>t</mi>
<mi>A</mi>
</mfrac>
<mo>=</mo>
<mi>h</mi>
<mo>-</mo>
<mi>B</mi>
<mo>*</mo>
<mi>ln</mi>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>+</mo>
<mfrac>
<mi>h</mi>
<mi>B</mi>
</mfrac>
<mo>)</mo>
</mrow>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>2</mn>
<mo>)</mo>
</mrow>
</mrow>
Step 3：Wetted front suction h is calculated according to formula (3)f：
hf=B-h0 (3)
Wherein, h0Represent fixed infiltration head height；
Step 4：Saturated hydraulic conductivity in soil K is calculated according to formula (4)：
<mrow>
<mi>K</mi>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>&theta;</mi>
<mi>s</mi>
</msub>
<mo>-</mo>
<msub>
<mi>&theta;</mi>
<mn>0</mn>
</msub>
</mrow>
<mi>A</mi>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>4</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, θ0Represent soil initial moisture, θsRepresent soil porosity；
Step 5：Rainfall spurt volume I is calculated according to formula (5)a：
<mrow>
<msub>
<mi>I</mi>
<mi>a</mi>
</msub>
<mo>=</mo>
<msub>
<mi>h</mi>
<mi>f</mi>
</msub>
<mrow>
<mo>(</mo>
<msub>
<mi>&theta;</mi>
<mi>s</mi>
</msub>
<mo>-</mo>
<msub>
<mi>&theta;</mi>
<mn>0</mn>
</msub>
<mo>)</mo>
</mrow>
<mfrac>
<mi>K</mi>
<mrow>
<mi>P</mi>
<mo>-</mo>
<mi>K</mi>
</mrow>
</mfrac>
<mo>-</mo>
<mo>-</mo>
<mo>-</mo>
<mrow>
<mo>(</mo>
<mn>5</mn>
<mo>)</mo>
</mrow>
</mrow>
Wherein, P represents rainfall intensity.
2. soil bacterial diversity wetted front suction according to claim 1 and rainfall spurt volume computational methods, wherein passing through cutting ring
Soil porosity θ described in sampling and measurings。
3. soil bacterial diversity wetted front suction according to claim 1 and rainfall spurt volume computational methods, wherein passing through soil
Soil initial moisture θ described in water content measurements determination0。
4. soil bacterial diversity wetted front suction according to claim 1 and rainfall spurt volume computational methods, wherein passing through minimum
Square law is fitted the parameter A and parameter B.
5. soil bacterial diversity wetted front suction according to claim 1 and rainfall spurt volume computational methods, wherein the water supply
Water Q is the water of water supply Markov bottle.
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| CN201510917405.6A CN105547957B (en) | 2015-12-10 | 2015-12-10 | Soil bacterial diversity wetted front suction and rainfall spurt volume computational methods |
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| CN201510917405.6A CN105547957B (en) | 2015-12-10 | 2015-12-10 | Soil bacterial diversity wetted front suction and rainfall spurt volume computational methods |
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| CN105547957B true CN105547957B (en) | 2018-05-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108426803A (en) * | 2018-03-02 | 2018-08-21 | 江西理工大学 | A kind of assay method of ion type rareearth One-dimensional Vertical Infiltration rule |
| CN109887241A (en) * | 2019-04-08 | 2019-06-14 | 河北省水利水电勘测设计研究院 | A kind of mountain flood weather warning calculation method and system |
| CN110029647B (en) * | 2019-05-10 | 2020-10-09 | 长沙理工大学 | Method for calculating limit bearing capacity of homogeneous foundation under penetration of front-peak rainwater |
| CN110400014A (en) * | 2019-07-23 | 2019-11-01 | 华东师范大学 | A kind of coastal cities multi-source flood method for numerical simulation based on GIS grid operation |
Citations (4)
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|---|---|---|---|---|
| CN101738356A (en) * | 2010-01-15 | 2010-06-16 | 鲁东大学 | Method for measuring and calculating soil wetting front suction |
| CN101762445A (en) * | 2010-01-15 | 2010-06-30 | 鲁东大学 | Soil saturation hydraulic conductivity measuring and calculating method based on infiltration time characteristic parameters |
| CN103063820A (en) * | 2013-01-04 | 2013-04-24 | 张振华 | Method and special device for measuring soil hydrodynamic parameters in situ in field |
| CN203365275U (en) * | 2013-04-12 | 2013-12-25 | 新疆维吾尔自治区水利水电科技信息中心 | Point source infiltration wetting front testing device based on Markov bottle |
-
2015
- 2015-12-10 CN CN201510917405.6A patent/CN105547957B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101738356A (en) * | 2010-01-15 | 2010-06-16 | 鲁东大学 | Method for measuring and calculating soil wetting front suction |
| CN101762445A (en) * | 2010-01-15 | 2010-06-30 | 鲁东大学 | Soil saturation hydraulic conductivity measuring and calculating method based on infiltration time characteristic parameters |
| CN103063820A (en) * | 2013-01-04 | 2013-04-24 | 张振华 | Method and special device for measuring soil hydrodynamic parameters in situ in field |
| CN203365275U (en) * | 2013-04-12 | 2013-12-25 | 新疆维吾尔自治区水利水电科技信息中心 | Point source infiltration wetting front testing device based on Markov bottle |
Non-Patent Citations (3)
| Title |
|---|
| A combined rainfall infiltration model based on Green-Ampt and SCS-curve number;李军 等;《Hydrological Processes》;20141212;第29卷;第2628-2634页 * |
| 微咸水入渗条件下Philip模型与Green-Ampt模型参数的对比分析;史晓楠;《土壤学报》;20070331;第44卷(第2期);第360-363页 * |
| 水循环综合模拟系统的降雨产流模型研究;刘昌明 等;《河海大学学报(自然科学版)》;20150930;第43卷(第5期);第378-382页第2-4节 * |
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