CN108428057A - A kind of computational methods of lake exchange water cycle - Google Patents
A kind of computational methods of lake exchange water cycle Download PDFInfo
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- CN108428057A CN108428057A CN201810219860.2A CN201810219860A CN108428057A CN 108428057 A CN108428057 A CN 108428057A CN 201810219860 A CN201810219860 A CN 201810219860A CN 108428057 A CN108428057 A CN 108428057A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a kind of computational methods of lake exchange water cycle, it is primarily based on the mean annual precipitation in basin where long-range meteorological data calculate lake, then lake basins gathering ground delimited by lake-basin digital elevation, calculates drainage area, calculates the average annual the total precipitation in entire basin；The reservoir storage in lake is calculated based on area of lake, mean depth etc.；Ratio by calculating the total precipitation of year in the average annual reservoir storage in lake and basin estimates lake exchange water cycle.It is only necessary to the parameters that lake basins mean annual precipitation, drainage area, area of lake and mean depth 4 are easily obtained and calculated for the method for the present invention, it can be achieved with quick, the Simple Calculation of lake exchange water cycle, the complicated observation such as lake current amount, area-depth of water volume curve, lake storage is come in and gone out come easy too much when calculating lake exchange water cycle than lake, can be widely applied to lake exchange water cycle develops to lake ecological environment and lake ecosystem health, ecosystem service assessment are studied etc..
Description
Technical field
The present invention relates to limnology, hydrology and monitoring technical fields, are related to a kind of determination of water body in lake exchange water cycle
Method is then specifically to develop a kind of lake based on lake basins average annual precipitation, drainage area, area of lake and mean depth
The Simple Calculation Method of exchange water cycle.
Background technology
The theory that traditional lake exchange water cycle is defined as length the time required to whole lake water exchange update once is general
Read, be judge a certain water resources in lake can sustainable utilization and the good condition of water quality amount of holding an important indicator.It calculates
Formula is as follows：
T=W/Q u
In formula,TFor exchange water cycle（It）,WFor the reservoir storage that is averaged for many years（m3）,Q uTo average out lake current amount for many years（m3/s）.It is average
Reservoir storage calculating needs to know lake underwater topography, is calculated according to area of lake-depth volume curve, and averages out lake
Flow Observation is very cumbersome, time-consuming and laborious, especially for there are the plain river network lake of reversing current, Accurate Determining to average out lake
Flow is extremely difficult, therefore often there is only theoretically lake exchange water cycle concepts in most lakes, are actually difficult to obtain
Its lake exchange water cycle value truly.
Under the effect of water body in lake complexity hydrodynamic environment, exchange water cycle has seriously affected lake region nutritive salt and pollutant
It migrates and converts, therefore, determination lake exchange water cycle quickly, easy is to carry out lake ecological environment evolution and the ecosystem
The premise and basis of assessment and forecasting research.
Invention content
Purpose of the present invention is to establish a kind of simple, fast and accurately lake exchange water cycle computational methods, it is suitable for lake
All kinds of water body in lake of the exchange water cycle from dozens of days to many decades, while operating method is easy, easy to spread and application.
In the present invention, using carrying out lake storage measurement and calculating and going out lake flow measurement, can accurately it calculate
Lake exchange water cycle, China typical case lake exchange water cycle data set of the time span from dozens of days to many decades are tested, are commented
Sentence the accuracy and applicability of exchange water cycle calculating.
A kind of computational methods of lake exchange water cycle proposed by the present invention, can specifically operate according to the following steps：
（1）The mean annual precipitation in basin where calculating lake；
（2）Water collection basin area area where calculating lake；
（3）According to water collection basin area area where mean annual precipitation and lake, it is total that the average annual precipitation in entire basin is calculated
Amount；
（4）The average annual reservoir storage in lake is calculated according to lake basins gathering ground area and average water gage；
（5）Lake exchange water cycle is obtained by calculating the average annual reservoir storage in lake and the ratio of the average annual the total precipitation in basin.
Advantages of the present invention and advantageous effect：
（1）Operation is very easy, and required at low cost, this method only needs to know lake basins average annual precipitation, water collection basin area
Area, area of lake and mean depth, and these parameters belong to the lake basins basic information for being highly susceptible to obtaining, and pass through remote sensing
It is easy to be calculated with digital elevation map.
（2）The present invention is abundant and has developed lake exchange water cycle concept, can be widely applied to carry out lake ecological environment
Understanding in terms of lake basins hydrologic process and its Impacts on ecology and environment is deepened in evolution and ecosystem system balance and forecasting research.
With reference to specific implementation case, the present invention will be described in detail.Protection scope of the present invention is not with specific real
The mode of applying is limited, but is defined in the claims.
Description of the drawings
Fig. 1 is 1971-2015 Chaohu Basin annual precipitation change in long term line charts；
Fig. 2 is the distribution of Chaohu Basin gathering ground and basin ponding area schematic diagram；
Fig. 3 is linear relationship signal between the exchange water cycle calculated using the method for the present invention exchange water cycle calculated and conventional method
Figure.
Specific implementation mode
Below using Chaohu Basin and China typical case lake exchange water cycle data set as example, this method is done furtherly
It is bright, 769.55 km of Chaohu area2, mean depth 2.69m.
（1）The mean annual precipitation in basin where calculating Chaohu；Fig. 1 is to be calculated based on 5 meteorological sites of Chaohu Basin
Obtained 1971-2015 precipitation change in long term figures year by year, Chaohu Basin average annual precipitation for many years is known that by this figure
For 1172 mm；
（2）The Chaohu Basin gathering ground delimited by lake-basin digital elevation calculates Chaohu Basin gathering ground area；Such as figure
Shown in 2, Chaohu Basin gathering ground area is 7190 km2。
（3）According to water collection basin area area where mean annual precipitation and lake, entire basin is calculated and drops every year
Water inventory；
（4）The reservoir storage in lake is calculated according to area of lake and average water gage；
（5）Exchange water cycle is obtained by calculating lake storage and the ratio of the average annual the total precipitation in basin.
（6）Historical document compile China typical case lake exchange water cycle data, to the exchange water cycle that obtains of the present invention into
Row verification：
The above method using the present invention calculates each typical lake exchange water cycle in China, the China compiled based on historical document
Typical lake exchange water cycle data test to the accuracy and applicability of the lake exchange water cycle of the invention calculated.
Table 1 is China typical case lake exchange water cycle data set of document report, and area of lake is from tens of square kilometres to number
Thousand square kilometres, for mean depth from less than 2m to tens of rice, exchange water cycle span passes through notebook data collection from dozens of days to many decades
The accuracy that the exchange water cycle of inspection calculates has extensive representative and applicability.
China typical case lake exchange water cycle data set of the 1 lake exchange water cycle span of table from dozens of days to many decades
| Lake title | Dongting Lake | Poyang Lake | Gaoyou Lake | Dianshan Lake | Hongchehu Lake | Lake Nanyi | Stone mortar lake | Dongping hu | Luoma Lake |
| Exchange water cycle（d） | 18.2 | 20.9 | 21.0 | 34.0 | 35.0 | 37.0 | 41.0 | 42.9 | 54.3 |
| Area of lake（m2） | 2432.5 | 2933 | 674.7 | 63.7 | 1576.9 | 148.4 | 210.4 | 148 | 260.0 |
| Mean depth（m） | 6.39 | 5.1 | 1.44 | 2.5 | 1.77 | 2.25 | 4.08 | 1.59 | 3.3 |
| Lake title | Jingpo Lake | Honghu | Chaohu | Nansi Lake | Taihu Lake | Liangzi Lake | Dian Chi | Qilu Lake | Different Long Hu |
| Exchange water cycle（d） | 174.1 | 190.2 | 210.4 | 222.5 | 310.5 | 312.8 | 364.7 | 379.3 | 554.6 |
| Area of lake（m2） | 91.5 | 344.4 | 769.55 | 1097.6 | 2338.1 | 304.3 | 297.9 | 36.86 | 30.8 |
| Mean depth（m） | 12.9 | 1.91 | 2.69 | 1.46 | 1.90 | 416 | 2.93 | 4.03 | 2.4 |
| Lake title | River, Lake Xingyun | Erhai | Gyaring Lake | Bosten | Ngoring Hu | Positive ancestor sea | Clear water sea | Cheng Hai | Lugu Lake |
| Exchange water cycle（d） | 706.9 | 1105.3 | 2676.2 | 3061.1 | 3124.4 | 4791.6 | 5363.3 | 8384.5 | 13977.4 |
| Area of lake（m2） | 34.71 | 249 | 526 | 992.2 | 610.7 | 31.68 | 7.2 | 77.22 | 48.45 |
| Mean depth（m） | 5.3 | 10.17 | 8.9 | 8.08 | 17.6 | 19.5 | 20 | 25.7 | 40.3 |
Fig. 3 is the linear relationship between the lake exchange water cycle based on the exchange water cycle of the invention calculated and historical document report.From
For this figure it is found that lake exchange water cycle span is from tens of hours to many decades, the lake exchange water cycle and history that the present invention calculates are literary
There is extremely notable positive correlation in the lake exchange water cycle for offering report, thus illustrate the science and standard of the exchange water cycle that the present invention calculates
True property.
Claims (4)
1. a kind of computational methods of lake exchange water cycle, which is characterized in that include the following steps：
（1）The mean annual precipitation in basin where calculating lake；
（2）Water collection basin area area where calculating lake；
（3）According to water collection basin area area where mean annual precipitation and lake, it is total that the average annual precipitation in entire basin is calculated
Amount；
（4）The reservoir storage in lake is calculated according to area of lake and average water gage；
（5）Lake exchange water cycle is obtained by calculating lake storage and the ratio of the average annual the total precipitation in basin.
2. method according to claim 1, which is characterized in that the step（1）In, basin averagely drops for many years where lake
Water is based on weather station in basin, and long-range meteorological observation data are calculated for many years.
3. method according to claim 1, which is characterized in that the step（2）In, it is drawn by lake-basin digital elevation
Determine lake basins gathering ground, obtains water collection basin area area.
4. according to the method described in claim 1, it is characterized in that, further including：
（6）China typical case lake exchange water cycle data are obtained based on historical document, to step（5）The lake exchange water cycle of acquisition into
Row verification.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109992746A (en) * | 2019-03-11 | 2019-07-09 | 中国气象科学研究院 | Atmosphere water substance total amount, total precipitable water and its corresponding precipitation efficiency calculation method |
Citations (4)
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| CN101650762A (en) * | 2009-09-03 | 2010-02-17 | 北京师范大学 | Lake ecological water need analysis technology based on function setting method |
| CN102745813A (en) * | 2012-04-23 | 2012-10-24 | 国家城市给水排水工程技术研究中心 | Method for ecology restoration and water quality maintenance of city landscape water body by adopting reclaimed water as supply |
| US20160162952A1 (en) * | 2014-12-04 | 2016-06-09 | At&T Intellectual Property I, L.P. | Entity relationship management system |
| CN107679021A (en) * | 2017-09-27 | 2018-02-09 | 中国科学院南京地理与湖泊研究所 | A kind of river Ru Hu storehouses method of calculating flux |
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2018
- 2018-03-16 CN CN201810219860.2A patent/CN108428057A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101650762A (en) * | 2009-09-03 | 2010-02-17 | 北京师范大学 | Lake ecological water need analysis technology based on function setting method |
| CN102745813A (en) * | 2012-04-23 | 2012-10-24 | 国家城市给水排水工程技术研究中心 | Method for ecology restoration and water quality maintenance of city landscape water body by adopting reclaimed water as supply |
| US20160162952A1 (en) * | 2014-12-04 | 2016-06-09 | At&T Intellectual Property I, L.P. | Entity relationship management system |
| CN107679021A (en) * | 2017-09-27 | 2018-02-09 | 中国科学院南京地理与湖泊研究所 | A kind of river Ru Hu storehouses method of calculating flux |
Non-Patent Citations (1)
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| 郭武 等: "湖南湘阴东湖水体生态流量及换水周期计算方法", 《中国林业科技大学学报》 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109992746A (en) * | 2019-03-11 | 2019-07-09 | 中国气象科学研究院 | Atmosphere water substance total amount, total precipitable water and its corresponding precipitation efficiency calculation method |
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