JP2001003402A - Water intake system using weir levee - Google Patents
Water intake system using weir leveeInfo
- Publication number
- JP2001003402A JP2001003402A JP11180441A JP18044199A JP2001003402A JP 2001003402 A JP2001003402 A JP 2001003402A JP 11180441 A JP11180441 A JP 11180441A JP 18044199 A JP18044199 A JP 18044199A JP 2001003402 A JP2001003402 A JP 2001003402A
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- Prior art keywords
- water
- water collecting
- pipe
- collecting pipe
- flow
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、堰堤を利用した取
水方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water intake system using a dam.
【０００２】[0002]
【従来の技術】全国の自治体における水道事業にあっ
て、水道水の取水には色々な方式が採用されている。そ
の主な例として表流水、集水埋渠井（接合井を含む）、
これらを組合せた水道水堰堤により行われてきた。2. Description of the Related Art In the water supply business of municipalities nationwide, various methods are used for tap water intake. The main examples are surface water, catchment buried wells (including junction wells),
It has been carried out by tap water dams combining these.
【０００３】しかし、このような取水方式の問題となっ
ている点は、安定した水量が確保できないこと、降雨時
或いは洪水時における水の汚濁処理が十分に行われない
こと、集水埋渠井の目詰まりが発生すること、浮遊物、
落ち葉等による取水管の目詰まりが発生すること等であ
る。[0003] However, the drawbacks of such a water intake method are that a stable amount of water cannot be secured, that the water pollution treatment during rainfall or flooding is not performed sufficiently, Clogging, suspended matter,
For example, the intake pipe may be clogged due to fallen leaves.
【０００４】このような取水方式の欠点は、多くの自治
体において問題としておるところであり、その解決に苦
慮している。[0004] Such drawbacks of the water intake system have been a problem in many municipalities, and it is difficult to solve the problem.
【０００５】このような取水方式は、元来自然流下を利
用して、しかも安いランニングコストで汚濁のない、清
澄な自然水の供給を目的したものであり、従って上記の
ような欠点を可能な限り排除するため、現在の水道水源
取水設備では、前記の表流水、集水埋渠井（接合井を含
む）等の取水の後、水は以下のような処理方法により、
即ち １．取水−緩速ろ過−滅菌−給水 ２．取水−薬品沈殿−急速ろ過−滅菌−給水 の処理行程により処理された後水道水として供給され
る。[0005] Such a water intake system is originally intended to supply clear natural water free of pollution at a low running cost by utilizing the natural flow, and therefore the above-mentioned drawbacks can be achieved. In order to eliminate as much as possible, with the current tap water source intake equipment, after the above-mentioned surface water, intake of the catchment buried well (including the junction well), etc., the water is treated by the following treatment method,
That is, 1. 1. Water intake-slow filtration-sterilization-water supply It is supplied as tap water after being treated by the process of water intake-chemical precipitation-rapid filtration-sterilization-water supply.
【０００６】しかし、このような処理行程にあっても、
降雨時、洪水時におけるように水が汚濁した状態にあっ
て、しかもその量が処理設備の能力、特にろ過機構の能
力を凌駕する程に多量である場合、ろ過が不十分にしか
行われないこととなり、水道水としての品質の保持が困
難となる。However, even in such a process,
If the water is polluted, such as during rainfall or flooding, and the amount is large enough to exceed the capacity of the treatment facility, especially the capacity of the filtration mechanism, insufficient filtration is performed. This makes it difficult to maintain the quality of tap water.
【０００７】[0007]
【発明が解決しようとする課題】本発明の根底をなす課
題は、上記のような公知の取水方式のもつ欠点を排除す
ることである。The problem underlying the present invention is to eliminate the disadvantages of the known water intake systems described above.
【０００８】[0008]
【課題を解決するための手段】上記の課題は本発明によ
り、堰堤を利用した取水方式において、通常の築堤様式
で構築された遮水域内に、堰堤を経てこの遮水域を穿孔
することにより多数の集水孔を備えている集水管を挿入
し、これらの集水管を合流集水管に開口させ、この合流
集水管の下流側端部を別個に構築した流速調整井内に開
口させたことによって解決される。SUMMARY OF THE INVENTION According to the present invention, in the water intake system using a dam, a large number of holes are formed by piercing the water-blocked area through a dam into a water-blocked area constructed in a usual embankment style. The problem is solved by inserting water collection pipes with water collection holes, opening these water collection pipes to the junction water collection pipe, and opening the downstream end of this junction water collection pipe to a separately constructed flow rate control well. Is done.
【０００９】本発明による他の構成により、集水管の集
水孔が楕円形孔であり、これらの孔が集水管の周面一体
に、周方向では互いに等間隔で、管軸線方向では互いに
位置ずれして形成されている。According to another embodiment of the present invention, the water collecting holes of the water collecting pipe are elliptical holes, and these holes are integrally formed on the circumferential surface of the water collecting pipe, equidistant from each other in the circumferential direction, and mutually positioned in the axial direction of the pipe. It is formed shifted.
【００１０】本発明による取水方式にあっては、合流集
水管が堰堤と流速調整井の外壁間の領域内において、堰
堤側に流量計を、流速調整井側に電動弁を備えている。[0010] In the water intake system according to the present invention, in the region between the dam and the outer wall of the flow rate adjusting well, the merged collecting pipe is provided with a flow meter on the dam side and an electric valve on the flow rate adjusting well side.
【００１１】本発明により、流速調整井はオーバーフロ
ー孔、取水管、マンホ−ルおよび排水ドレン口を備えて
いる竪型ピットとして形成されている。According to the invention, the flow control well is formed as a vertical pit having an overflow hole, an intake pipe, a manhole and a drain port.
【００１２】取水量を調整するために、有利な構成とし
て本発明により、流速調整井からの取水管の出口の近傍
に電磁弁が設けられている。According to the invention, a solenoid valve is provided in the vicinity of the outlet of the water intake from the flow-rate regulating well in order to regulate the water intake.
【００１３】本発明の根底をなす思想は、従来のラジア
ルウエル（立型集水井）における井筒を施工することな
く、砂防堰堤、水道用貯水堰堤等の堰堤内に多数の集水
管を埋設することによりこの堰堤を直接利用し、これら
の集水管を合流した一本の合流集水管とし、これと流速
調整井とを組合せることによって取水することにある。[0013] The idea underlying the present invention is that a large number of water collection pipes are buried in dams such as sabo dams and water supply dams without constructing wells in conventional radial wells (vertical collecting wells). Therefore, this dam is directly used, and these collecting pipes are combined into one combined collecting pipe, and water is collected by combining this with a flow velocity adjusting well.
【００１４】集水管の集水孔は、本発明においては楕円
形の孔としているが、上記のように砂防堰堤、水道用貯
水堰堤等の遮水域における集水量と流速調整井とを組合
せることにより、この孔がスリット形に、円形に、或い
はスクリーン状に形成した孔であっても、集水量は楕円
形の孔よりは少々劣るが同様な効果が達せられる。The water collecting hole of the water collecting pipe is an elliptical hole in the present invention. However, as described above, the water collecting amount and the flow velocity adjusting well in the impermeable area such as the sabo dam and the water storage dam are used. Accordingly, even when the hole is formed in a slit shape, a circular shape, or a screen shape, the same effect can be obtained although the amount of collected water is slightly inferior to the elliptical hole.
【００１５】[0015]
【発明の実施の態様】図１および図２には本発明による
取水方式の基本構想を断面図と正面図で示した。1 and 2 are a sectional view and a front view showing a basic concept of a water intake system according to the present invention.
【００１６】図１に示すように、小川、河川等に築堤様
式で構築されている堰堤Ａにおいて、取水に適している
かどうかを適当な方法で検証し、取水の可能性が確認さ
れたら、ボーリング等により穿孔することにより堰堤Ａ
を経て、その遮水域内に穿孔孔を形成し、多数の集水管
を挿入埋設する。As shown in FIG. 1, in a bank A constructed in a levee style in a stream, river, or the like, it is verified by an appropriate method whether or not water is suitable for water intake. Dike A by drilling
After that, a perforated hole is formed in the impermeable area, and a number of water collecting pipes are inserted and buried.
【００１７】これら集水管１はその周面一体に多数の集
水孔を備えている。この集水孔の形状は楕円形であるの
が有利である。この形状に選定した理由は、他に種々の
形状で、例えばスリット、円形或いはスクリーンの形状
で形成されていてもよいが、砂防堰堤、水道用貯水堰堤
等の遮水域における集水量と集水流速調整井とを組合せ
ることによる試験の結果、楕円形の形状が集水量が多量
に得られ、好適であることが確認されたことによる。These water collecting pipes 1 are provided with a large number of water collecting holes on the peripheral surface thereof. Advantageously, the shape of this catchment hole is elliptical. The reason for selecting this shape is that it may be formed in various other shapes such as a slit, a circular shape or a screen shape. As a result of a test in combination with a regulating well, it was confirmed that an oval shape was suitable because a large amount of water was collected.
【００１８】これらの孔は集水管１の周方向ではそれら
の間隔は一定であり、縦軸線方向では互いに位置ずれし
て形成されている。In the circumferential direction of the water collecting pipe 1, the distance between these holes is constant, and the holes are formed so as to be displaced from each other in the direction of the vertical axis.
【００１９】これらの集水管１の遮水域Ｃ内での配設方
法（例えば扇形等に）、互いの間隔およびこの集水管１
の長さは一定しておらず、任意の間隔および長さであっ
てよい。しかし、長さに関しては、１５ｍから３０ｍで
あるのが有利である。The method of arranging these water collecting pipes 1 in the water shielding area C (for example, in a fan shape), the distance between each other, and the water collecting pipes 1
The length is not constant and may be any spacing and length. However, as regards the length, it is advantageously between 15 and 30 m.
【００２０】この多数の集水管１は、それらの堰堤方向
（流れ下流方向）で手前に埋設されている一本の合流集
水管２に通じている。即ち、多数の集水管１はそれぞれ
この合流集水管２内に開口し、従って集水はこの合流集
水管において合流して一つの合流集水流として形成され
る。The large number of water collecting pipes 1 communicate with a single combined water collecting pipe 2 buried in the front in the direction of the bank (downstream of the flow). That is, each of the multiple collecting pipes 1 is opened into the combined collecting pipe 2, so that the combined water is merged in the combined collecting pipe to form one combined collecting flow.
【００２１】上記の合流集水管２は下流側において堰堤
Ａを貫通して、流速調整井Ｂ内へと延在して、合流集水
管２′を形成している。The merged water collecting pipe 2 penetrates the bank A on the downstream side and extends into the flow velocity adjusting well B to form a merged water collecting pipe 2 '.
【００２２】一定の取水効果を達するためには、流速調
整井Ｂ内に流入する集水流の流速、即ち流速調整井Ｂ内
への合流集水管２′内の流速を可能な限り一定に維持す
ること、即ち最低限取水流量を取水管４に対する流速調
整井Ｂ内の取水水位Ｌ4 に維持することが必要である。
種々の試験の結果、この流速が一定の値、特に０，７ｍ
／秒以下に保持するのが有利であることが分かった。そ
れ以上の流速の場合、集水管１の孔に枯れ葉、ゴミ等が
付着して孔が目詰まりを起こす。In order to achieve a certain water intake effect, the flow velocity of the catchment flow flowing into the flow velocity control well B, that is, the flow velocity in the confluent collecting pipe 2 'into the flow velocity control well B is kept as constant as possible. it, that it is necessary to maintain the minimum intake flow rate intake water level L 4 in the flow rate adjusting well B for water intake pipe 4.
As a result of various tests, this flow velocity was a constant value, especially 0.7 m
It has been found to be advantageous to keep it below 1 / sec. If the flow velocity is higher than that, dead leaves, dust and the like adhere to the holes of the water collecting pipe 1, and the holes are clogged.
【００２３】この場合、上記のような流速を一定の値に
維持するために、合流集水管２はこの流速調整井Ｂ内に
流入する領域、即ち堰堤Ａと流速調整井Ｂの外壁との領
域内において、堰堤Ａ側においては流量計２５を備えて
おり、流速調整井Ｂ側には電動弁、例えば電磁弁１５を
備えている。In this case, in order to maintain the above-mentioned flow velocity at a constant value, the junction water collecting pipe 2 is provided in a region flowing into the flow velocity control well B, that is, a region between the dam A and the outer wall of the flow velocity control well B. Inside, a flow meter 25 is provided on the bank A side, and an electric valve, for example, an electromagnetic valve 15 is provided on the flow rate adjusting well B side.
【００２４】この流量計２５により合流集水管２内の集
水量を測定し、その値に基づいて電磁弁を調節して、流
速調整井Ｂ内への集水の流速を少なくとも最高０，７ｍ
／秒とする。The flow meter 25 measures the amount of water collected in the merged water collecting pipe 2 and adjusts the solenoid valve based on the measured value to increase the flow rate of water collected into the flow rate adjusting well B by at least 0.7 m.
/ Sec.
【００２５】降雨時および洪水時は水は堰堤Ａを表流水
面Ｌ1 で溢流し、通常時は表流水面Ｌ2 で孔２０を経て
流れる。During rainfall and flooding, the water overflows the embankment A at the surface water level L 1 , and normally flows through the holes 20 at the surface water surface L 2 .
【００２６】時として集水量が多くなる場合は、即ち流
入水位Ｌ3 以上の水量においてはオーバーフロー管３を
経て余分な水量が流速調整井Ｂ外へと放流される。しか
し、常時は取水水位Ｌ4 は上記の流量計２５と電磁弁１
５とにより常に維持される。When the amount of collected water is sometimes large, that is, when the amount of water is equal to or higher than the inflow water level L 3, an extra amount of water is discharged to the outside of the flow velocity adjusting well B through the overflow pipe 3. However, normally, the intake water level L 4 is equal to the flow meter 25 and the solenoid valve 1.
5 is always maintained.
【００２７】取水管４の下流側において、流速調整井Ｂ
の出口近傍にも電動弁、例えば電磁弁５が設けられてい
る。この電磁弁５は流速調整井Ｂからの取水管４を経て
流れる実際に使用に供される取水量の調節を行う。At the downstream side of the intake pipe 4, the flow velocity adjusting well B
A motor-operated valve, for example, a solenoid valve 5 is also provided near the outlet. The solenoid valve 5 adjusts the amount of water actually used for use flowing through the water intake pipe 4 from the flow velocity adjusting well B.
【００２８】流速調整井Ｂの機能は、取水管内の流速と
流量とを調節することであり、この目的のためには、こ
の取水管を取水水位Ｌ4 に対して上下動させるのが理想
的であるが、取水管を上下動させるには、上下動する取
水管と流速調整井Ｂの壁面間の構造が、例えば駆動機構
の設置、水密性の点で複雑となり不利である。こう言っ
た点から上記のように流量計２５と電動弁、例えば電磁
弁１５を設けて流速調節を可能にした。このことによ
り、集水管１内に多量の水が集水されたとしても、これ
により流速調整井Ｂ内の取水水準Ｌ4 は常に維持され
る。The function of the flow rate adjustment wells B is to regulate the flow rate and the flow rate of the intake pipe, for this purpose, ideally vertically moving the intake pipe relative to intake water level L 4 However, moving the intake pipe up and down is disadvantageous because the structure between the intake pipe moving up and down and the wall surface of the flow velocity adjusting well B is complicated, for example, in terms of installation of a drive mechanism and watertightness. From these points, the flowmeter 25 and the motor-operated valve, for example, the solenoid valve 15 are provided as described above to enable the flow rate adjustment. Thus, even a large amount of water is collecting in the water collecting pipe 1, thereby water intake level L 4 in the flow rate adjusting well B is always maintained.
【００２９】参照符号７は排水ドレン口を示している。
この排水ドレン口は、例えばピットの様式の流速調整井
Ｂ内を清掃する際の余分な水の排水に役立つ。ピット内
の清掃のための流速調整井Ｂ内へ進入はマンホール６か
ら階段を経て行われる。Reference numeral 7 denotes a drain port.
This drainage drain serves for drainage of excess water, for example, when cleaning the inside of the flow control well B in the form of a pit. The entry into the flow rate control well B for cleaning the pit is performed from the manhole 6 through the stairs.
【００３０】[0030]
【発明の効果】本発明により、安定した取水量の確保、
ろ過された原水の取水の確保、浮遊物および洪水時での
濁度の半減が達せられ、更にろ過池の構築および維持に
要する経費、作業のための作業員の労務費等が節約され
る。According to the present invention, it is possible to secure a stable water intake,
It is possible to secure the intake of filtered raw water, to reduce turbidity by suspended matter and flooding, and to save the cost required for construction and maintenance of the filtration pond and the labor cost of workers for work.
【図１】本発明による取水方式を示すための、流れ縦軸
線（上流から下流側方向）に沿った諸設備の断面図であ
る。FIG. 1 is a cross-sectional view of various facilities along a longitudinal flow line (from upstream to downstream) to show a water intake system according to the present invention.
【図２】本発明による取水方式を示すための、流れ横軸
線（堰堤を横断する方向）に沿った諸設備の断面図であ
る。FIG. 2 is a cross-sectional view of various facilities taken along a horizontal flow axis (a direction crossing a bank) to show a water intake system according to the present invention.
１ 集水管 ２ 合流集水管 ３ オーバーフロー孔 ４ 取水管 ５ 電磁弁 ６ マンホ−ル ７ ドレン １５ 電動弁 ２０ 孔 ２５ 流量計 Ａ 堰堤 Ｂ 流速調整井 Ｃ 遮水域 DESCRIPTION OF SYMBOLS 1 Water collecting pipe 2 Merging water collecting pipe 3 Overflow hole 4 Intake pipe 5 Solenoid valve 6 Manhole 7 Drain 15 Motorized valve 20 Hole 25 Flow meter A Dam B Flow velocity adjusting well C
───────────────────────────────────────────────────── フロントページの続き (72)発明者 栖原 秀郎 東京都港区赤坂四丁目９番９号 日本国土 開発株式会社内 (72)発明者 磯貝 定治 長野県上水内郡豊野町大字石661−５ ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideo Suhara 4-9-9 Akasaka, Minato-ku, Tokyo Inside Japan Land Development Co., Ltd.
Claims (5)
て、通常の築堤様式で構築された遮水域（Ｃ）内に、堰
堤（Ａ）を経てこの遮水域（Ｃ）を穿孔することにより
多数の集水孔を備えている集水管（１）を挿入し、これ
らの集水管（１）を合流集水管（２）に開口させ、この
合流集水管（２）の下流側端部（２′）を別個に構築し
た流速調整井（Ｂ）内に開口させたことを特徴とする取
水方式。In a water intake system using a dam (A), a large number of water-blocking areas (C) are pierced through a dam (A) into a water-blocking area (C) constructed in a usual embankment style. The water collecting pipes (1) having the water collecting holes are inserted, and these water collecting pipes (1) are opened to the merging water collecting pipe (2), and the downstream end (2 ′) of the merging water collecting pipe (2) is inserted. ) Is opened in the flow rate adjusting well (B) separately constructed.
り、これらの孔が集水管の周面一体に、周方向では互い
に等間隔で、管軸線方向では互いに位置ずれして形成さ
れていることを特徴とする請求項１に記載の取水方式。2. A water collecting hole of the water collecting pipe (1) is an elliptical hole, and these holes are integrally formed on the circumferential surface of the water collecting pipe, at equal intervals in the circumferential direction, and displaced from each other in the axial direction of the pipe. The water intake system according to claim 1, wherein the water intake system is formed.
（Ｂ）の外壁間の領域内において、堰堤側に流量計（２
５）を、流速調整井（Ｂ）側に電動弁（１５）を備えて
いることを特徴とする請求項２に記載の取水方式。3. A flow meter (2) is provided on the dam side in a region between the dam and the outer wall of the flow rate adjusting well (B).
The water intake system according to claim 2, wherein 5) is provided with a motor-operated valve (15) on the flow rate adjusting well (B) side.
（３）、取水管（４）、マンホ−ル（６）および排水ド
レン口（７）を備えている竪型ピットとして形成されて
いることを特徴とする請求項１に記載の取水方式。4. The flow control well (B) is formed as a vertical pit having an overflow hole (3), an intake pipe (4), a manhole (6) and a drain port (7). The water intake system according to claim 1, wherein:
出口の近傍に電磁弁（５）が設けられていることを特徴
とする請求項１に記載の取水方式。5. The water intake system according to claim 1, wherein an electromagnetic valve (5) is provided near an outlet of the water intake pipe (4) from the flow velocity control well (B).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11180441A JP2001003402A (en) | 1999-06-25 | 1999-06-25 | Water intake system using weir levee |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11180441A JP2001003402A (en) | 1999-06-25 | 1999-06-25 | Water intake system using weir levee |
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| Publication Number | Publication Date |
|---|---|
| JP2001003402A true JP2001003402A (en) | 2001-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11180441A Pending JP2001003402A (en) | 1999-06-25 | 1999-06-25 | Water intake system using weir levee |
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| JP (1) | JP2001003402A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2207350A1 (en) * | 2001-04-06 | 2004-05-16 | P. Gustavo Figuerola Garcia De La Pastora | Civil engineering drainage system includes pump extracting the water via drains of different orientations and levels also increasing soil permeability |
| JP2006322161A (en) * | 2005-05-17 | 2006-11-30 | Sukeyasu Maekawa | Intake installation of river |
| KR101204059B1 (en) * | 2012-05-23 | 2012-11-23 | 주식회사 팬아시아워터 | Horizontal well flow measurement system |
| KR101463479B1 (en) * | 2012-10-25 | 2014-11-20 | 주식회사 광명건설 | Simple waterworks filtration device |
| CN105735408A (en) * | 2016-03-30 | 2016-07-06 | 中节能先导城市节能有限公司 | High-adaptability natural seepage and filtration duplex water taking system |
| JP2017150137A (en) * | 2016-02-22 | 2017-08-31 | 山大機電株式会社 | Water supply facility for intaking water from an existing checkdam |
| KR102097089B1 (en) * | 2019-04-10 | 2020-04-03 | 한국바이오이엔지 주식회사 | Water level measurement device for river |
| WO2020125602A1 (en) * | 2018-12-21 | 2020-06-25 | 中国电建集团贵阳勘测设计研究院有限公司 | Deep water obtaining system and operating method therefor |
| CN114525828A (en) * | 2022-02-23 | 2022-05-24 | 郭锐朋 | Box culvert type large seawater taking structure |
| CN115030266A (en) * | 2022-06-17 | 2022-09-09 | 中水北方勘测设计研究有限责任公司 | Water resource combined mining method for river in rich water period or dry water period |
-
1999
- 1999-06-25 JP JP11180441A patent/JP2001003402A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2207350A1 (en) * | 2001-04-06 | 2004-05-16 | P. Gustavo Figuerola Garcia De La Pastora | Civil engineering drainage system includes pump extracting the water via drains of different orientations and levels also increasing soil permeability |
| JP2006322161A (en) * | 2005-05-17 | 2006-11-30 | Sukeyasu Maekawa | Intake installation of river |
| KR101204059B1 (en) * | 2012-05-23 | 2012-11-23 | 주식회사 팬아시아워터 | Horizontal well flow measurement system |
| KR101463479B1 (en) * | 2012-10-25 | 2014-11-20 | 주식회사 광명건설 | Simple waterworks filtration device |
| JP2017150137A (en) * | 2016-02-22 | 2017-08-31 | 山大機電株式会社 | Water supply facility for intaking water from an existing checkdam |
| CN105735408A (en) * | 2016-03-30 | 2016-07-06 | 中节能先导城市节能有限公司 | High-adaptability natural seepage and filtration duplex water taking system |
| WO2020125602A1 (en) * | 2018-12-21 | 2020-06-25 | 中国电建集团贵阳勘测设计研究院有限公司 | Deep water obtaining system and operating method therefor |
| KR102097089B1 (en) * | 2019-04-10 | 2020-04-03 | 한국바이오이엔지 주식회사 | Water level measurement device for river |
| CN114525828A (en) * | 2022-02-23 | 2022-05-24 | 郭锐朋 | Box culvert type large seawater taking structure |
| CN115030266A (en) * | 2022-06-17 | 2022-09-09 | 中水北方勘测设计研究有限责任公司 | Water resource combined mining method for river in rich water period or dry water period |
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