JP3555128B2 - Water purification levee and method of withdrawing water from its inner water area - Google Patents

Water purification levee and method of withdrawing water from its inner water area Download PDF

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Publication number
JP3555128B2
JP3555128B2 JP21005598A JP21005598A JP3555128B2 JP 3555128 B2 JP3555128 B2 JP 3555128B2 JP 21005598 A JP21005598 A JP 21005598A JP 21005598 A JP21005598 A JP 21005598A JP 3555128 B2 JP3555128 B2 JP 3555128B2
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Prior art keywords
water
area
water area
tide
inland
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JP2000045244A (en
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衛 石垣
修二 宮岡
博和 辻
真 小林
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Obayashi Corp
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Obayashi Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は、所望の浄化水域を取り囲むようにして構築される水質浄化堤及びその内水域からの取水方法に関する。
【０００２】
【従来の技術】
ウオーターフロントにおいてアメニティに富んだ親水空間を確保するためには、水質を浄化して良好な水環境を形成することが不可欠であるが、その目的達成手段として水質浄化堤が注目されている。
【０００３】
水質浄化堤１は、図４に示すように礫や砕石からなる堤体材２を海底３からほぼ台形状に積み上げ、これを所定の被覆石４で被覆したものであり、所定の水域を取り囲むようにして構築しておけば、自然生態系の水質浄化機能によって清浄な水質の内水域６を創出することができる。
【０００４】
すなわち、干潮から満潮に移行する際は、外水域５の海水が水質浄化堤１の堤体材２の間隙を通って内水域６に移動するが、そのときに海水中に含まれるプランクトン等の汚濁成分は、堤体材２の表面に付着形成された微生物群からなる生物膜によって付着あるいは捕捉され、さらに礫間に棲息する貝類や甲殻類によって摂取され除去される。
【０００５】
一方、満潮から干潮への逆方向の流れによって、人工的なメンテナンスを必要とすることなく、堤体材２の目詰まりが防止されるとともに、かかる往復流によって内水域６の水交換も可能となる。
【０００６】
【発明が解決しようとする課題】
このように水質浄化堤１が本来持っている自然の浄化機能を維持するためには、潮の干満を利用した往復流が不可欠となるが、浄化された海水を例えば工業用水として内水域６から取水する場合には、満潮から干潮に移行する際に、本来であれば図５（ａ）に示すように内水域６から外水域５へ流れるはずの海水が、取水量（取水速度）が大きすぎると、同図（ｂ）に示すように外水域５には流れ出さず、内水域６に逆流するという問題を生じていた。
【０００７】
かかる問題は、海水の流れが常時一方向となって堤体材２が目詰まりを起こし、水交換機能や自然の浄化機能が低下する原因となる。
【０００８】
本発明は、上述した事情を考慮してなされたもので、内水域から取水する際にも海水の往復流を確保することが可能な水質浄化堤及びその内水域からの取水方法を提供することを目的とする。
【０００９】
【課題を解決するための手段】
上記目的を達成するため、本発明に係る水質浄化堤は請求項１に記載したように、両端を陸地につなげることで該陸地近傍に拡がる海域を外水域と内水域とに分離するように堤体材を積み上げて構築してなるとともに、前記内水域の水が取水利用される水質浄化堤であって、前記内水域からの時間あたりの取水量をＱ、満潮から干潮までの時間をＴ、潮差をＨとしたとき、内水域の面積Ａが、Ａ＞Ｑ・Ｔ／Ｈとなるように構築したものである。
【００１０】
また、本発明に係る水質浄化堤は請求項２に記載したように、両端を陸地につなげることで該陸地近傍に拡がる海域を外水域と内水域とに分離するように堤体材を積み上げて構築してなるとともに、前記内水域の水が取水利用される水質浄化堤であって、前記内水域から取水可能な取水設備を備えてなり、該取水設備を、前記内水域の面積をＡ、満潮から干潮までの時間をＴ、潮差をＨとしたとき、その時間あたりの取水量Ｑが、Ｑ＜Ａ・Ｈ／Ｔとなるように構成したものである。
【００１１】
また、本発明に係る水質浄化堤の内水域からの取水方法は請求項３に記載したように、両端を陸地につなげることで該陸地近傍に拡がる海域を外水域と内水域とに分離するように堤体材を積み上げて構築してなるとともに、前記内水域の水が取水利用される水質浄化堤の内水域の面積をＡ、満潮から干潮までの時間をＴ、潮差をＨとしたとき、内水域からの時間あたりの取水量Ｑを、Ｑ＜Ａ・Ｈ／Ｔに取水制限するものである。
【００１２】
本発明に係る水質浄化堤及びその内水域からの取水方法においては、堤体材を積み上げて構成した水質浄化堤の内水域からの時間あたりの取水量をＱ、満潮から干潮までの時間をＴ、潮差をＨ、内水域の面積をＡとしたとき、これらが、Ａ＞Ｑ・Ｔ／Ｈ、あるいはＱ＜Ａ・Ｈ／Ｔなる関係を満足するように内水域の面積Ａを確保し、あるいは時間あたりの取水量Ｑを制限する。
【００１３】
このようにすると、満潮から干潮までの内水域における水位降下速度Ｑ／Ａは、外水域における水位降下速度Ｈ／Ｔを常に下回ることとなり、かかる時間帯において内水域から外水域へと向かう海水の流れが確保される。
【００１４】
満潮から干潮までの時間Ｔについては、設計上概ね６時間と定めることができるが、起潮力は複雑に変動して完全な周期性を持たないので、かかる時間Ｔをどのように定めるかは任意である。
【００１５】
潮差Ｈすなわち満潮と干潮の潮位の差についても、これをどのように設定するかは任意であるが、時期的変動及び地理的変動を考慮した上で最小値をとるようにすれば、年間を通して海水の往復流を確保することが可能となる。ちなみに、かかる最小値としては、月の起潮力が太陽の起潮力と打ち消し合って小さくなる上弦あるいは下弦のとき、すなわち小潮のときの潮差を用いることが考えられる。
【００１６】
【発明の実施の形態】
以下、本発明に係る水質浄化堤及びその内水域からの取水方法の実施の形態について、添付図面を参照して説明する。なお、従来技術と実質的に同一の部品等については同一の符号を付してその説明を省略する。
【００１７】
（第１実施形態）
【００１８】
図１は、本実施形態に係る水質浄化堤１１を示した全体平面図である。同図でわかるように、本実施形態に係る水質浄化堤１１は、全体として円弧状に形成してあり、その両端を陸地１２につなげることで、陸地１２近傍に拡がる海域を外水域５と内水域６とに分離するように構築してある。
【００１９】
ここで、水質浄化堤１１は、任意の目的、例えば工業用水として利用すべく、内水域６の水を取水することを前提としているが、そのときの時間あたりの取水量をＱ、満潮から干潮までの時間をＴ、潮差をＨとしたとき、内水域６の面積ＡがＡ＞Ｑ・Ｔ／Ｈとなるように水質浄化堤１１を構築してある。
【００２０】
水質浄化堤１１の断面構成については、図４で説明した従来の水質浄化堤１と同様、堤体材２を海底３からほぼ台形状に積み上げ、これを所定の被覆石４で被覆して構成してあり、堤体材２としては、生物膜が付着するとともに貝等の生物が棲息できるもの、例えば粒径が２０ｃｍ〜３０ｃｍ程度の礫や砕石あるいはコンクリート廃材などを使用することができる。
【００２１】
ここで、満潮から干潮までの時間Ｔについては、設計上概ね６時間と定めることができる。また、潮差Ｈすなわち満潮と干潮の潮位の差としては、小潮のときの潮差を用いるのが望ましい。小潮のときの潮差を用いれば、年間を通して海水の往復流を常時確保することが可能となる。
【００２２】
本実施形態に係る水質浄化堤１１においては、内水域６からの時間あたりの取水量をＱ、満潮から干潮までの時間をＴ、潮差をＨ、内水域の面積をＡとしたとき、これらが、Ａ＞Ｑ・Ｔ／Ｈなる関係を満足するように内水域６の面積Ａを確保してある。
【００２３】
このようにすると、満潮から干潮までの内水域における水位降下速度Ｖ２＝Ｑ／Ａは、図２に示すように、外水域５における水位降下速度Ｖ１＝Ｈ／Ｔを常に下回ることとなり、かかる時間帯での取水時においても、内水域６の海水は、外水域５へと流れ出す。
【００２４】
以上説明したように、本実施形態に係る水質浄化堤１１によれば、満潮から干潮までの内水域における水位降下速度Ｖ２＝Ｑ／Ａが、外水域５における水位降下速度Ｖ１＝Ｈ／Ｔを常に下回るので、満潮から干潮までの時間帯に時間あたりＱだけ取水したとしても、内水域６の海水は、外水域５へと流れだす。一方、干潮から満潮までの時間帯は、取水の有無に関わらず外水域５から内水域６へと海水が流れ込む。
【００２５】
したがって、水質浄化堤１１の断面内において海水の往復流を確保することが可能となるとともに、その結果として堤体材２の目詰まりが未然に防止され、水交換機能や自然の浄化機能をメンテナンスフリーで維持することが可能となる。
【００２６】
（第２実施形態）
【００２７】
次に、第２実施形態に係る水質浄化堤及びその内水域からの取水方法について説明する。なお、上述の実施形態と実質的に同一の部品等については同一の符号を付してその説明を省略する。
【００２８】
図３は、本実施形態に係る水質浄化堤２１を示した全体平面図である。同図でわかるように、本実施形態に係る水質浄化堤２１についても水質浄化堤１１と同様、全体として円弧状に形成してあり、その両端を陸地１２につなげることで、陸地１２近傍に拡がる海域を外水域５と内水域６とに分離するように構築してある。
【００２９】
ここで、水質浄化堤２１には、任意の目的、例えば工業用水として利用すべく、内水域６から水を取水する取水設備２２を設置してあり、該取水設備は、内水域６の面積をＡ、満潮から干潮までの時間をＴ、潮差をＨとしたとき、その時間あたりの取水量ＱがＱ＜Ａ・Ｈ／Ｔとなるように構成してある。
【００３０】
本実施形態に係る水質浄化堤２１及びその内水域からの取水方法においては、取水設備２２を介して内水域６から取水する際、時間あたりの取水量ＱがＱ＜Ａ・Ｈ／Ｔとなるように取水制限を行う。
【００３１】
このように取水設備２２の取水量Ｑを制限すると、満潮から干潮までの内水域における水位降下速度Ｖ２＝Ｑ／Ａは、図２と同様、外水域５における水位降下速度Ｖ１＝Ｈ／Ｔを常に下回ることとなり、かかる時間帯での取水時においても、内水域６の海水は外水域５へと流れ出す。
【００３２】
以上説明したように、本実施形態に係る水質浄化堤２１及びその内水域からの取水方法によれば、満潮から干潮までの内水域における水位降下速度Ｖ２＝Ｑ／Ａが、外水域５における水位降下速度Ｖ１＝Ｈ／Ｔを常に下回るので、満潮から干潮までの時間帯に時間あたりＱだけ取水したとしても、内水域６の海水は、外水域５へと流れだす。一方、干潮から満潮までの時間帯は、取水の有無に関わらず外水域５から内水域６へと海水が流れ込む。
【００３３】
したがって、水質浄化堤２１の断面内において海水の往復流を確保することが可能となるとともに、その結果として堤体材２の目詰まりが未然に防止され、水交換機能や自然の浄化機能をメンテナンスフリーで維持することが可能となる。
【００３４】
本実施形態では、内水域６からの取水を取水設備２２で行うようにしたが、かかる恒久的な取水設備２２を設置せずとも、例えば給水車のような浄化水搬送手段を介して内水域６から取水するようにしてもよい。かかる場合においても、上述したと同様に内水域６からの取水量を制限するようにすれば、やはり水質浄化堤２１の断面内で海水の往復流を確保することが可能となる。
【００３５】
【発明の効果】
以上述べたように、本発明に係る水質浄化堤及びその内水域からの取水方法によれば、満潮から干潮までの時間帯に取水したとしても、内水域の海水は、外水域へと流れだすので、水質浄化堤の断面内において海水の往復流を確保することが可能となり、その結果として堤体材の目詰まりが未然に防止され、水交換機能や自然の浄化機能をメンテナンスフリーで維持することが可能となる。
【００３６】
【図面の簡単な説明】
【図１】第１実施形態に係る水質浄化堤の全体平面図。
【図２】第１実施形態に係る水質浄化堤の作用を示した断面図。
【図３】第２実施形態に係る水質浄化堤の全体平面図。
【図４】従来技術に係る水質浄化堤の断面図。
【図５】内水域から取水する場合の海水の流れを示した従来の水質浄化堤の断面図。
【符号の説明】
５ 外水域
６ 内水域
１１、２１ 水質浄化堤
２２ 取水設備[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a water purification levee constructed so as to surround a desired purified water area and a method of withdrawing water from an internal water area.
[0002]
[Prior art]
In order to secure a hydrophilic space full of amenities at the waterfront, it is essential to purify the water quality and form a favorable water environment, but a water purification wall has been attracting attention as a means for achieving the purpose.
[0003]
As shown in FIG. 4, the water purification levee 1 is a levee body material 2 composed of gravel or crushed stone, which is piled up in a substantially trapezoidal shape from the seabed 3 and is covered with a predetermined covering stone 4 to surround a predetermined water area. If constructed in this way, the inland waters 6 with clean water quality can be created by the water purification function of the natural ecosystem.
[0004]
In other words, when shifting from low tide to high tide, the seawater in the outer water area 5 moves to the inner water area 6 through the gap between the embankment materials 2 of the water purification levee 1, and plankton and the like contained in the seawater at that time. The pollutant components are attached or captured by a biofilm composed of a group of microorganisms attached to the surface of the embankment material 2, and are further taken up and removed by shellfish and crustaceans living between the gravel.
[0005]
On the other hand, the reverse flow from high tide to low tide prevents clogging of the embankment material 2 without requiring artificial maintenance, and the reciprocating flow also enables water exchange in the inland waters 6. Become.
[0006]
[Problems to be solved by the invention]
As described above, in order to maintain the natural purification function of the water purification purifier 1, a reciprocating flow utilizing the ebb and flow of the tide is indispensable. However, the purified seawater is used as, for example, industrial water from the inland waters 6. In the case of water intake, at the time of transition from high tide to low tide, as shown in FIG. 5 (a), seawater that would otherwise flow from the internal water area 6 to the external water area 5 has a large water intake amount (water intake speed). If it is too long, there is a problem that it does not flow out to the outer water area 5 and flows back to the inner water area 6 as shown in FIG.
[0007]
Such a problem causes the flow of seawater to always be in one direction, causing clogging of the embankment material 2 and causing a decrease in a water exchange function and a natural purification function.
[0008]
The present invention has been made in view of the above circumstances, and provides a water purification levee capable of securing a reciprocating flow of seawater even when taking water from an inland water area, and a method of withdrawing water from the inland water area. With the goal.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the water purifying embankment according to the present invention, as described in claim 1, connects both ends to land to separate a sea area extending near the land into an outer water area and an inner water area. A water purification purifier that is constructed by stacking body materials, and the water in the inland water area is used for water intake. The amount of water taken per hour from the inland water area is Q, the time from high tide to low tide is T, When the tidal range is H, the area A of the inland water area is constructed so that A> Q · T / H.
[0010]
Further, as described in claim 2, the water purification purifier according to the present invention is constructed by stacking embankment members so that the sea area extending near the land is separated into an outer water area and an inner water area by connecting both ends to the land. A water purification levee in which the water in the inland water area is used for water intake, which is provided with a water intake facility capable of withdrawing water from the internal water area. When the time from the high tide to the low tide is T and the tide difference is H, the amount of water withdrawal Q per time is such that Q <A · H / T.
[0011]
In addition, the method for withdrawing water from the inner water area of the water purification purifier according to the present invention is such that the sea area extending near the land is separated into an outer water area and an inner water area by connecting both ends to land. When the area of the inner water area of the water purification levee where the water of the inner water area is used is A, the time from high tide to low tide is T, and the tidal difference is H , The amount of water withdrawal Q per hour from the inland water area is limited to Q <A · H / T.
[0012]
In the water purification levee and the method of withdrawing water from the inner water area according to the present invention, the amount of water withdrawn from the inner water area of the water purification levee constructed by stacking the embankment materials per unit time is Q, and the time from high tide to low tide is T. Assuming that the tidal difference is H and the area of the inland water area is A, the area A of the inland water area is secured so that these satisfy the relationship of A> Q · T / H or Q <A · H / T. Or limit the amount of water withdrawal Q per hour.
[0013]
In this way, the water level descent speed Q / A in the inland water region from high tide to low tide is always lower than the water level descent speed H / T in the external water region, and in such a time zone, the seawater flowing from the internal water region to the external water region Flow is ensured.
[0014]
The time T from high tide to low tide can be determined to be approximately 6 hours in design, but since the tidal power fluctuates in a complex manner and does not have perfect periodicity, how to determine the time T is as follows. Optional.
[0015]
The tidal range H, that is, the difference between the high tide and the low tide, can be set arbitrarily, but if the minimum value is taken into account in consideration of the seasonal and geographical variations, the annual , It is possible to secure a reciprocating flow of seawater. Incidentally, as such a minimum value, it is conceivable to use a tide difference when the lunar tide rises or lowers when the lunar tide rises and negates the sun tide, that is, when the tide rises.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of a water purification levee according to the present invention and a method of withdrawing water from an inner water area thereof will be described with reference to the accompanying drawings. In addition, the same reference numerals are given to components and the like that are substantially the same as those in the related art, and description thereof is omitted.
[0017]
(1st Embodiment)
[0018]
FIG. 1 is an overall plan view illustrating a water purification bank 11 according to the present embodiment. As can be seen from the figure, the water purification levee 11 according to the present embodiment is formed in an arc shape as a whole, and by connecting both ends thereof to the land 12, the sea area expanding near the land 12 is connected to the outer water area 5 and the inner water area. It is constructed to be separated from the water area 6.
[0019]
Here, the water purification levee 11 is premised on taking water from the inland waters 6 for any purpose, for example, using it as industrial water. The water quality purification levee 11 is constructed so that the time A until T is T and the tide difference is H, and the area A of the inland water area 6 is A> Q · T / H.
[0020]
Regarding the cross-sectional structure of the water purification levee 11, similarly to the conventional water purification levee 1 described with reference to FIG. 4, the embankment material 2 is piled up in a substantially trapezoidal shape from the seabed 3 and covered with a predetermined covering stone 4. The embankment material 2 is a material that can attach a biofilm and inhabit organisms such as shells, such as gravel, crushed stone, or concrete waste having a particle size of about 20 cm to 30 cm.
[0021]
Here, the time T from the high tide to the low tide can be determined to be approximately 6 hours by design. As the tide difference H, that is, the difference between the high tide and the low tide, it is desirable to use the tide difference at the time of the ebb tide. By using the tidal range at the time of the ebb tide, it is possible to always maintain the reciprocating flow of seawater throughout the year.
[0022]
In the water purification levee 11 according to this embodiment, when the amount of water withdrawn from the inland water area 6 per hour is Q, the time from high tide to low tide is T, the tide difference is H, and the area of the inland water area is A, However, the area A of the inner water area 6 is ensured so as to satisfy the relationship of A> Q · T / H.
[0023]
In this way, the water level descent speed V 2 = Q / A in the inland water area from high tide to low tide is always lower than the water level descent rate V 1 = H / T in the external water area 5, as shown in FIG. At the time of water intake in such a time zone, the seawater in the inner water area 6 flows out to the outer water area 5.
[0024]
As described above, according to the water purification levee 11 according to the present embodiment, the water level descent speed V 2 = Q / A in the inland water region from high tide to low tide is equal to the water level descent speed V 1 = H / in the external water region 5. Since it is always below T, the seawater in the inner water area 6 flows out to the outer water area 5 even if Q is withdrawn per hour during the period from high tide to low tide. On the other hand, during the period from low tide to high tide, seawater flows from the outer water area 5 to the inner water area 6 regardless of the presence or absence of water intake.
[0025]
Therefore, it is possible to secure the reciprocating flow of seawater within the cross section of the water purification levee 11, and as a result, the clogging of the levee body material 2 is prevented beforehand, and the water exchange function and the natural purification function are maintained. It can be maintained free.
[0026]
(2nd Embodiment)
[0027]
Next, a water purification levee according to the second embodiment and a method of withdrawing water from the inner water area thereof will be described. It is to be noted that the same reference numerals are given to components and the like that are substantially the same as those in the above-described embodiment, and description thereof will be omitted.
[0028]
FIG. 3 is an overall plan view illustrating the water purification bank 21 according to the present embodiment. As can be seen from the figure, the water purification levee 21 according to the present embodiment is also formed in an arc shape as a whole similarly to the water purification levee 11, and is connected to the land 12 so that the water purification levee 21 extends near the land 12. It is constructed so that the sea area is separated into an outer water area 5 and an inner water area 6.
[0029]
Here, the water purifying levee 21 is provided with a water intake 22 for taking water from the internal water area 6 for any purpose, for example, for use as industrial water. The water intake equipment reduces the area of the internal water area 6. A, when the time from high tide to low tide is T, and the tidal difference is H, the water withdrawal Q per time is Q <A · H / T.
[0030]
In the water purification wall 21 and the method of withdrawing water from the inland water area according to the present embodiment, when water is withdrawn from the inland water area 6 via the water intake facility 22, the amount of water withdrawal Q per time is Q <A · H / T. Water intake is restricted as follows.
[0031]
When the water intake amount Q of the water intake equipment 22 is limited in this way, the water level descent speed V 2 = Q / A in the inland water area from high tide to low tide is the water level descent rate V 1 = H / in the external water area 5 as in FIG. T is always lower than T, and the seawater in the inner water area 6 flows out to the outer water area 5 even during water intake in such a time zone.
[0032]
As described above, according to the water purification levee 21 and the method of withdrawing water from the inner water area according to the present embodiment, the water level descending speed V 2 = Q / A in the inner water area from high tide to low tide is higher than the outer water area 5. Since the water level descending speed V 1 is always lower than H / T, the seawater in the inner water area 6 flows out to the outer water area 5 even if Q is taken per hour during the period from high tide to low tide. On the other hand, during the period from low tide to high tide, seawater flows from the outer water area 5 to the inner water area 6 regardless of the presence or absence of water intake.
[0033]
Therefore, it is possible to secure the reciprocating flow of seawater in the cross section of the water purification levee 21, and as a result, the clogging of the levee body material 2 is prevented beforehand, and the water exchange function and the natural purification function are maintained. It can be maintained free.
[0034]
In the present embodiment, the water intake from the internal water area 6 is performed by the water intake equipment 22. However, even if the permanent water intake equipment 22 is not installed, the internal water area is supplied via the purified water transport means such as a water truck. 6 may be taken. Even in such a case, if the amount of water taken out from the inland water area 6 is limited as described above, it is also possible to secure the reciprocating flow of seawater within the cross section of the water purification levee 21.
[0035]
【The invention's effect】
As described above, according to the water purification purifier and the method of withdrawing water from the inner water area according to the present invention, seawater in the inner water area flows to the outer water area even when water is withdrawn during the time from high tide to low tide. Therefore, it is possible to secure the reciprocating flow of seawater within the cross section of the water purification levee, thereby preventing clogging of the levee body material and maintaining the water exchange function and the natural purification function without maintenance. It becomes possible.
[0036]
[Brief description of the drawings]
FIG. 1 is an overall plan view of a water purification purifier according to a first embodiment.
FIG. 2 is a sectional view showing the operation of the water purification bank according to the first embodiment.
FIG. 3 is an overall plan view of a water purification purifier according to a second embodiment.
FIG. 4 is a cross-sectional view of a water purification bank according to the related art.
FIG. 5 is a cross-sectional view of a conventional water purification dike showing a flow of seawater when water is taken from an internal water area.
[Explanation of symbols]
5 Outer water area 6 Inner water area 11, 21 Water purification dike 22 Intake facility

Claims (3)

両端を陸地につなげることで該陸地近傍に拡がる海域を外水域と内水域とに分離するように堤体材を積み上げて構築してなるとともに、前記内水域の水が取水利用される水質浄化堤であって、前記内水域からの時間あたりの取水量をＱ、満潮から干潮までの時間をＴ、潮差をＨとしたとき、内水域の面積Ａが、Ａ＞Ｑ・Ｔ／Ｈとなるように構築したことを特徴とする水質浄化堤。A water purification levee that is constructed by stacking embankment members so as to separate the sea area extending near the land by connecting both ends to the land and separating it into an outer water area and an inner water area, and that water in the inner water area is used for intake. When the amount of water withdrawn from the inland water area per hour is Q, the time from high tide to low tide is T, and the tidal difference is H, the area A of the inland water area is A> Q · T / H. Water purification purifier characterized by having been constructed as follows. 両端を陸地につなげることで該陸地近傍に拡がる海域を外水域と内水域とに分離するように堤体材を積み上げて構築してなるとともに、前記内水域の水が取水利用される水質浄化堤であって、前記内水域から取水可能な取水設備を備えてなり、該取水設備を、前記内水域の面積をＡ、満潮から干潮までの時間をＴ、潮差をＨとしたとき、その時間あたりの取水量Ｑが、Ｑ＜Ａ・Ｈ／Ｔとなるように構成したことを特徴とする水質浄化堤。A water purification levee that is constructed by stacking embankment members so as to separate the sea area extending near the land by connecting both ends to the land and separating it into an outer water area and an inner water area, and that water in the inner water area is used for intake. And an intake system capable of withdrawing water from the inland water area, wherein the area of the inland water area is A, the time from high tide to low tide is T, and the tide difference is H, A water purification levee characterized in that a water intake Q per unit is configured to satisfy Q <A · H / T. 両端を陸地につなげることで該陸地近傍に拡がる海域を外水域と内水域とに分離するように堤体材を積み上げて構築してなるとともに、前記内水域の水が取水利用される水質浄化堤の内水域の面積をＡ、満潮から干潮までの時間をＴ、潮差をＨとしたとき、内水域からの時間あたりの取水量Ｑを、Ｑ＜Ａ・Ｈ／Ｔに取水制限することを特徴とする水質浄化堤の内水域からの取水方法。A water purification levee that is constructed by stacking embankment members so as to separate the sea area extending near the land by connecting both ends to the land and separating it into an outer water area and an inner water area, and that water in the inner water area is used for intake. When the area of the inland water area is A, the time from high tide to low tide is T, and the tidal difference is H, the water intake Q per hour from the inland water area is limited to Q <A · H / T. A characteristic method of water intake from the inner waters of the water purification dike.
JP21005598A 1998-07-24 1998-07-24 Water purification levee and method of withdrawing water from its inner water area Expired - Fee Related JP3555128B2 (en)

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JP5223051B2 (en) * 2005-01-26 2013-06-26 うつろ株式会社 Advanced purification method using closed water area by “Utsuro”
JP4858142B2 (en) * 2006-12-12 2012-01-18 株式会社大林組 Seawater purification system and seawater purification method
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