CN103411591A - Fixing and warning equipment of undersea measuring instrument and tossing and withdrawing method thereof - Google Patents
Fixing and warning equipment of undersea measuring instrument and tossing and withdrawing method thereof Download PDFInfo
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- CN103411591A CN103411591A CN2013103239734A CN201310323973A CN103411591A CN 103411591 A CN103411591 A CN 103411591A CN 2013103239734 A CN2013103239734 A CN 2013103239734A CN 201310323973 A CN201310323973 A CN 201310323973A CN 103411591 A CN103411591 A CN 103411591A
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Abstract
The invention discloses fixing and warning equipment of an undersea measuring instrument. The equipment comprises a water surface platform, an anchor line I, an anchor line II, an iron anchor I, an iron anchor II, a bottom rope I, a bottom rope II and an instrument rack, wherein a warning device is arranged on the water surface platform; one ends of the anchor line I and the anchor line II are respectively connected with the water surface platform, and the connecting points of the anchor lines I and II with the water surface platform are uniformly distributed on the water surface platform; the other end of the anchor line I is connected with one ends of the iron anchor I and the bottom rope I; the other end of the anchor line II is connected with one ends of the iron anchor II and the bottom rope II; the other ends of the bottom ropes I and II are connected with the instrument rack, and the connecting points of the bottom ropes I and II with the instrument rack are uniformly distributed on the instrument rack. The invention also discloses a tossing and withdrawing method of the equipment. Due to the adoption of the equipment and the method, the measuring instrument can be stably fixed undersea and is not affected by ocean currents and bad weather so as to avoid drift. Moreover, the warning effect on the water surface is obvious and striking, so that passing ships can easily identify and yield, and accordingly the instrument can not be damaged by the ships.
Description
Technical field
The present invention relates to the marine charting field, particularly fixedly caution device and the recovery method of jettisoninging thereof of a kind of subsea survey instrument.
Background technology
When the bottom topographic survey of the construction of oceanographic engineering, scientific research stage in early stage and construction stage and fairway depth monitoring, usually need to gather the relevant hydrographic datas such as offshore tidal level and trend.When offshore need to arrange interim tidal level station or stream gaging station without island or in the offshore engineering zone, often need throw in the setting seabed surveying instruments such as tidal level instrument or trend instrument, during operation, to only reach fishing boat more due to offshore contact cargo ship, the fishing boat trawling is arranged simultaneously, the instrument thrown often can be destroyed by passing ships because warning mark is not obvious and fixed effect is not good, perhaps under the harsh climate condition, because fixed effect is not good, drift about away from the original place that throws, cause giving instrument for change, both caused suitable economic loss, more lost precious measurement data, and the carrying out of incuring loss through delay research work.
Existing subsea survey instrument throw commonly used the having of fixing Apparatus and method for: 1. single anchor throws method, i.e. instrument stand sub-connection anchor, then connect a ball float as water surface sign on anchor.Although the method, structure are simply, but the measure shortcoming that the protection underwater instrument is lost, only with an anchor retainer instrument shelf, stability is not good enough, be subject to the impact of sea tide and weather extremes, cause the drift of instrument, and water surface warning mark is not obvious, thereby is difficult for being found to be vulnerable to destroy by passing ships.2. the acoustic communication release throws method, it is the combination of acoustic communication system and release, wherein the acoustic communication system comprises deck unit waterborne and underwateracoustic communicator, also need to configure a set of positioning product under water and accessory, equipment set needs hundreds of thousands yuan, cost is high, but that job state and method and single anchor throw method is close, has same protection and the problem of secure context.
Summary of the invention
In order to address the above problem, the invention provides a kind of subsea survey instrument fixedly caution device and the recovery method of jettisoninging thereof.The technical problem to be solved in the present invention is: the poor stability of fixing when the subsea survey instrument is worked in seabed is easy to drift and loses; And its alarming effect on sea is not obvious, the ship that is easy to be come and gone destroys.In order to solve the problems of the technologies described above, technical scheme of the present invention is: the subsea survey instrument is caution device fixedly, it is characterized in that, comprises surface platform, anchor line I, anchor line II, anchor I, anchor II, end rope I, end rope II, instrument stand; Described surface platform is provided with alarming device; One end of described anchor line I and anchor line II is connected with surface platform respectively, and the tie point of described anchor line I and anchor line II and surface platform is uniformly distributed on surface platform; The other end of described anchor line I is connected with an end of end rope I with the anchor I; The other end of described anchor line II is connected with an end of end rope II with the anchor II; Rope I of the described end is connected with instrument stand with the other end of end rope II, and the tie point of rope I of the described end and end rope II and instrument stand is uniformly distributed on instrument stand; Described anchor line I and anchor line II equal in length; Described end rope I and end rope II equal in length; Being equal in weight of described anchor I and anchor II.
In such scheme, on rope I of the described end and end rope II, distance is equipped with cord-pressing block with 1～3 meter of anchor link.
In such scheme, the weight of described cord-pressing block is 5～10kg.
In such scheme, described alarming device comprises warning lamp and alarm flag.Alarm flag is convenient to passing ships and is found in time by day to dodge; And warning lamp glimmered at night, be convenient to passing ships and find in time to dodge.
The present invention also provides the fixedly recovery method of jettisoninging of caution device of subsea survey instrument.Comprise the following steps: depth of water H, higher low tide water-head Δ h, fluctuation tide maximum flow of water speed V and the trend that A. measures the low slack tide of dumping point to;
B. the data that record according to steps A, determine anchor line, the length of end rope and the weight of anchor; And design the dumping point of anchor I and anchor II; The dumping point of described anchor I is positioned at the trend updrift side of instrument dumping point, the length of restricting the end of for the distance of instrument dumping point; The dumping point of described anchor II is positioned at the trend downstream direction of instrument dumping point, the length of restricting the end of for the distance of instrument dumping point;
C. install the alarming device on surface platform; Set the surveying instrument that will be placed in seabed and by apparatus installation on instrument stand; A restrict end of I and end rope II of the end is connected on instrument stand; The restrict other end of I and end rope II of the end is carried out to rope sling; One end of anchor line I is connected with the anchor I; The restrict rope sling of I of the end is worn to the junction of anchor line I and anchor I; The other end of anchor line I is connected with surface platform; One end of anchor line II is connected with the anchor II; The restrict rope sling of II of the end is worn to the junction of anchor line II and anchor II; The other end of anchor line II is in free state;
D. after arriving predetermined anchor I dumping point, the anchor I is dished out, the rope sling end of end rope I sinks thereupon simultaneously; And the position of position the record anchor I; Then, the fair tide direction comes downwards to the instrument dumping point, and the instrument stand that surveying instrument is installed is placed in to seabed; Then surface platform is jettisoninged in the sea of this instrument dumping point, and the position of position the record instrument frame and surface platform.
E. the fair tide direction continues to come downwards to anchor II dumping point, and the anchor II is jettisoninged, and the rope sling end of end rope II sinks thereupon simultaneously, locates and record the position of anchor II, finally the free-end of anchor line II is connected with surface platform;
F. after subsea survey apparatus measures task completes, regain the step of surveying instrument: the tidal water flow when reclaiming is to being connected between, the anchor line of at first removing the trend downstream part and surface platform; Then reclaim this anchor line and the anchor be connected with this anchor line, end rope; Thereafter, reclaim seabed instrument stand and on instrument; Again, remove the anchor line of trend upstream and being connected of surface platform, and surface platform is regained, the rope sling end of the end rope now be connected with the upstream extremity anchor can be deviate to regain from surface platform, removing the anchor line free-end be connected; Finally reclaim anchor line and the anchor of trend upstream.
In such scheme, in described step C, at rope sling end 1～3m place of rope I of the described end of distance and end rope II, each fixes a cord-pressing block, and the weight of described cord-pressing block is 5～10kg;
In such scheme, in described step B, the length calculation method of anchor line is:
Wherein, S is anchor line length, and its unit is m; H is the depth of water of low slack tide, and its unit is m; △ h is the water-head of the height slack tide of ocean, and its unit is m; V is the maximum flow of water speed of the fluctuation time of tide, and its unit is m/s; λ is the Lidar Equation coefficient of ocean, and its empirical value is 0.1～0.3.
In such scheme, in described step B, the end length calculation method of rope is:
, wherein, DS is end rope length, its unit is m; S is anchor line length, and its unit is m; H is the depth of water of low slack tide, and its unit is m; △ h is the water-head of the height slack tide of ocean, and its unit is m.
In such scheme, in described step B, the computing formula of the weight of anchor is:
Wherein, K is anchor weight, and its unit is kg; V is the maximum flow of water speed of the fluctuation time of tide, and its unit is m/s.
Advantage of the present invention and beneficial effect are: the invention provides a kind of equipment that is fixed in seabed that can make the subsea survey instrument stabilizer, make it not be subjected to the impact of sea tide and weather extremes, do not drift about; And the alarming effect of its water surface is obviously eye-catching, is easy to be dodged by passing ships identification, thereby avoids instrument to be damaged by passing ships.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is structural representation of the present invention.
In figure: 1, rope sling 12, warning lamp 13, the alarm flag of surface platform 2, anchor line I 3, anchor line II 4, anchor I 5, anchor II 6, end rope I 7, end rope II 8, cord-pressing block 9, instrument stand 10, subsea survey instrument 11, end rope
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is further described.Following examples are only for technical scheme of the present invention more clearly is described, and can not limit the scope of the invention with this.
As shown in Figure 1, the present invention is fixedly caution device and the recovery method of jettisoninging thereof of a kind of subsea survey instrument, comprises surface platform 1, anchor line I 2, anchor line II 3, anchor I 4, anchor II 5, end rope I 6, end rope II 7, instrument stand 9, be equipped with subsea survey instrument 10 on instrument stand 9; On surface platform 1, be provided with warning lamp 12 and alarm flag 13; Alarm flag is convenient to passing ships and is found in time by day to dodge; And warning lamp glimmered at night, be convenient to passing ships and find in time to dodge.
Embodiment 1
The surveying instrument dumping point is near coastal marine site Ningbo of Zhejiang.At first, the depth of water H of the low slack tide in surveying instrument dumping point is 10m; Higher low tide potential difference Δ h is 4m; Fluctuation tide maximum flow of water speed V is 1.5m/s; And trend to; Then according to above-mentioned data, determine anchor line, the length of end rope and the weight of anchor; Concrete grammar is: the length calculation method of anchor line:
Wherein, λ is the Lidar Equation coefficient of ocean, and getting its empirical value is 0.1; As calculated, the length of anchor line is 32.6m.The end length calculation method of rope is:
As calculated, the length of end rope is 29.4m; The computing formula of the weight of anchor is:
As calculated, the weight of anchor is 61.5kg; Then, determine the dumping point of anchor I 4 and anchor II 5; The dumping point of anchor I 4 is the trend updrift side of instrument dumping point, the length 29.4m restricted the end of for to the distance of instrument dumping point; The dumping point of anchor II 5 is the trend downstream direction of instrument dumping point, the length 29.4m restricted the end of for to the distance of instrument dumping point;
Alarm flag and warning lamp are fixed on surface platform, set the time that warning lamp is started working; Then, by set the surveying instrument that will be placed in seabed and by apparatus installation on instrument stand; A restrict end of I 6 and end rope II 7 of the end is connected on instrument stand 9; The end, restricted to the other end of I 6 and end rope II 7 is carried out rope sling 11 and the fixing cord-pressing block 8 at 2 meters of distance rope sling; The weight of cord-pressing block 8 is 5kg; One end of anchor line I 2 is connected with anchor I 4; The restrict rope sling of I 6 of the end is worn to the junction of anchor line I 2 and anchor I 4; The other end of anchor line I 2 is connected with surface platform 1; One end of anchor line II 3 is connected with anchor II 5; The restrict rope sling of II 7 of the end is worn to the junction of anchor line II 3 and anchor II 5; The other end of anchor line II 3 is in free state.
Then arrive anchor I 4 dumping points, first anchor I 4 is dished out, the rope sling end of end rope I 6 sinks with anchor line I 2 with the cord-pressing block 8 be attached thereto simultaneously; And the position of position the record anchor I; Then, the fair tide direction comes downwards to the instrument dumping point, and the instrument stand 9 that surveying instrument 10 is installed is placed in to seabed; Then surface platform 1 is jettisoninged in the sea of instrument dumping point, and the position of position the record instrument frame 9 and surface platform 1.
After instrument stand 9 and surface platform 1 had been jettisoninged, the fair tide direction continued to come downwards to anchor II 5 dumping points, and sank to the bottom down simultaneously rope II 7 and the cord-pressing block 8 on it, and the position of locating and recording anchor II 5, finally be connected the free-end of anchor line II 7 with surface platform 1.
After subsea survey apparatus measures task completes, regain the step of surveying instrument: the tidal water flow when reclaiming is to being connected between, the anchor line of at first removing the trend downstream part and surface platform; Then reclaim this anchor line and the anchor be connected with this anchor line, end rope; Thereafter, reclaim seabed instrument stand and on instrument; Then, remove the anchor line of trend upstream and being connected of surface platform, and surface platform is regained, the rope sling end of the end rope now be connected with the upstream extremity anchor can be deviate to regain from surface platform, removing the anchor line free-end be connected; Finally reclaim anchor line and the anchor of trend upstream.
The surveying instrument dumping point is the strong tide in Qiantang Estuary district.At first, the depth of water H of the low slack tide in surveying instrument dumping point is 3m; Higher low tide potential difference Δ h is 7m; Fluctuation tide maximum flow of water speed V is 6m/s; And trend to; Then according to above-mentioned data, determine anchor line, the length of end rope and the weight of anchor; Concrete grammar is: the length calculation method of anchor line:
Wherein, λ is the Lidar Equation coefficient of ocean, and getting its empirical value is 0.1; As calculated, the length of anchor line is 35.5m.The end length calculation method of rope is:
As calculated, the length of end rope is 34m; The computing formula of the weight of anchor is:
As calculated, the weight of anchor is 122.5kg; Then, determine the dumping point of anchor I 4 and anchor II 5; The dumping point of anchor I 4 is the trend updrift side of instrument dumping point, the length 34m restricted the end of for to the distance of instrument dumping point; The dumping point of anchor II 5 is the trend downstream direction of instrument dumping point, the length 34m restricted the end of for to the distance of instrument dumping point;
Alarm flag and warning lamp are fixed on surface platform, set the time that warning lamp is started working; Then, by set the surveying instrument that will be placed in seabed and by apparatus installation on instrument stand; A restrict end of I 6 and end rope II 7 of the end is connected on instrument stand 9; The end, restricted to the other end of I 6 and end rope II 7 is carried out rope sling 11 and the fixing cord-pressing block 8 at 2 meters of distance rope sling; The weight of cord-pressing block 8 is 10kg; One end of anchor line I 2 is connected with anchor I 4; The restrict rope sling of I 6 of the end is worn to the junction of anchor line I 2 and anchor I 4; The other end of anchor line I 2 is connected with surface platform 1; One end of anchor line II 3 is connected with anchor II 5; The restrict rope sling of II 7 of the end is worn to the junction of anchor line II 3 and anchor II 5; The other end of anchor line II 3 is in free state.
Then arrive anchor I 4 dumping points, first anchor I 4 is dished out, the rope sling end of end rope I 6 sinks with anchor line I 2 with the cord-pressing block 8 be attached thereto simultaneously; And the position of position the record anchor I; Then, the fair tide direction comes downwards to the instrument dumping point, and the instrument stand 9 that surveying instrument 10 is installed is placed in to seabed; Then surface platform 1 is jettisoninged in the sea of instrument dumping point, and the position of position the record instrument frame 9 and surface platform 1.
After instrument stand 9 and surface platform 1 had been jettisoninged, the fair tide direction continued to come downwards to anchor II 5 dumping points, and sank to the bottom down simultaneously rope II 7 and the cord-pressing block on it, and the position of locating and recording anchor II 5, finally be connected the free-end of anchor line II 7 with surface platform 1.
After subsea survey apparatus measures task completes, regain the step of surveying instrument: the tidal water flow when reclaiming is to being connected between, the anchor line of at first removing the trend downstream part and surface platform; Then reclaim this anchor line and the anchor be connected with this anchor line, end rope; Thereafter, reclaim seabed instrument stand and on instrument; Then, remove the anchor line of trend upstream and being connected of surface platform, and surface platform is regained, the rope sling end of the end rope now be connected with the upstream extremity anchor can be deviate to regain from surface platform, removing the anchor line free-end be connected; Finally reclaim anchor line and the anchor of trend upstream.
The invention provides the computing formula of anchor line length, end rope length and anchor weight, in real work, those skilled in the art can make suitable fine setting according to implementation condition and self experience on the basis of result of calculation.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. the fixing caution device of subsea survey instrument, is characterized in that, comprises surface platform, anchor line I, anchor line II, anchor I, anchor II, end rope I, end rope II, instrument stand; Described surface platform is provided with alarming device; One end of described anchor line I and anchor line II is connected with surface platform respectively, and the tie point of described anchor line I and anchor line II and surface platform is uniformly distributed on surface platform; The other end of described anchor line I is connected with an end of end rope I with the anchor I; The other end of described anchor line II is connected with an end of end rope II with the anchor II; Rope I of the described end is connected with instrument stand with the other end of end rope II, and the tie point of rope I of the described end and end rope II and instrument stand is uniformly distributed on instrument stand; Described anchor line I and anchor line II equal in length; Described end rope I and end rope II equal in length; Being equal in weight of described anchor I and anchor II.
2. the fixing caution device of subsea survey instrument according to claim 1, is characterized in that, on rope I of the described end and end rope II apart from 1～3 meter of anchor link, being equipped with cord-pressing block.
3. the fixing caution device of subsea survey instrument according to claim 2, is characterized in that, the weight of described cord-pressing block is 5～10kg.
4. according to the fixing caution device of the arbitrary described subsea survey instrument of claim 1～3, it is characterized in that, described alarming device comprises warning lamp and alarm flag.
5. the fixing recovery method of jettisoninging of caution device of the described water-bed surveying instrument of claim 1, is characterized in that, comprises the following steps:
A. the depth of water H of the low slack tide of surveying instrument dumping point, height tidal level water-head Δ h, fluctuation tide maximum flow of water speed V and trend to;
B. the data that record according to steps A, determine anchor line, the length of end rope and the weight of anchor; And design the dumping point of anchor I and anchor II; The dumping point of described anchor I is positioned at the trend updrift side of instrument dumping point, the length of restricting the end of for the distance of instrument dumping point; The dumping point of described anchor II is positioned at the trend downstream direction of instrument dumping point, the length of restricting the end of for the distance of instrument dumping point;
C. install the alarming device on surface platform; Set the surveying instrument that will be placed in seabed and by apparatus installation on instrument stand; A restrict end of I and end rope II of the end is connected on instrument stand; The restrict other end of I and end rope II of the end is carried out to rope sling; One end of anchor line I is connected with the anchor I; The restrict rope sling of I of the end is worn to the junction of anchor line I and anchor I; The other end of anchor line I is connected with surface platform; One end of anchor line II is connected with the anchor II; The restrict rope sling of II of the end is worn to the junction of anchor line II and anchor II; The other end of anchor line II is in free state;
D. after arriving predetermined anchor I dumping point, the anchor I is dished out, the rope sling end of end rope I sinks thereupon simultaneously; And the position of position the record anchor I; Then, the fair tide direction comes downwards to the instrument dumping point, and the instrument stand that surveying instrument is installed is placed in to seabed; Then surface platform is jettisoninged in the sea of this instrument dumping point, and the position of position the record instrument frame and surface platform;
E. the fair tide direction continues to come downwards to anchor II dumping point, and the anchor II is jettisoninged, and the rope sling end of end rope II sinks thereupon simultaneously, locates and record the position of anchor II, finally the free-end of anchor line II is connected with surface platform;
F. after subsea survey apparatus measures task completes, regain the step of surveying instrument: the tidal water flow when reclaiming is to being connected between, the anchor line of at first removing the trend downstream part and surface platform; Then reclaim this anchor line and the anchor be connected with this anchor line, end rope; Thereafter, reclaim seabed instrument stand and on instrument; Again, remove the anchor line of trend upstream and being connected of surface platform, and surface platform is regained, the rope sling end of the end rope now be connected with the upstream extremity anchor can be deviate to regain from surface platform, removing the anchor line free-end be connected; Finally reclaim anchor line and the anchor of trend upstream.
6. the fixing recovery method of jettisoninging of caution device of water-bed surveying instrument according to claim 5, it is characterized in that, in described step C, at rope sling end 1～3m place of rope I of the described end of distance and end rope II, each fixes a cord-pressing block, and the weight of described cord-pressing block is 5～10kg.
7. according to the fixing recovery method of jettisoninging of caution device of the arbitrary described water-bed surveying instrument of claim 5 or 6, it is characterized in that, in described step B, the length calculation method of anchor line is:
Wherein, S is anchor line length, and its unit is m; H is the depth of water of low slack tide, and its unit is m; △ h is the water-head of the height slack tide of ocean, and its unit is m; V is the maximum flow of water speed of the fluctuation time of tide, and its unit is m/s; λ is the Lidar Equation coefficient of ocean, and its empirical value is 0.1～0.3.
8. the fixing recovery method of jettisoninging of caution device of water-bed surveying instrument according to claim 7, is characterized in that, in described step B, the end length calculation method of rope is:
Wherein, DS is end rope length, and its unit is m; S is anchor line length, and its unit is m; H is the depth of water of low slack tide, and its unit is m; △ h is the water-head of the height slack tide of ocean, and its unit is m.
9. according to the fixing recovery method of jettisoninging of caution device of the arbitrary described water-bed surveying instrument of claim 5 or 6, it is characterized in that, in described step B, the computing formula of the weight of anchor is:
Wherein, K is anchor weight, and its unit is kg; V is the maximum flow of water speed of the fluctuation time of tide, and its unit is m/s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310323973.4A CN103411591B (en) | 2013-07-26 | 2013-07-26 | A kind of subsea survey instrument fixes caution device and recovery method of jettisoninging |
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| CN201310323973.4A CN103411591B (en) | 2013-07-26 | 2013-07-26 | A kind of subsea survey instrument fixes caution device and recovery method of jettisoninging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945201A (en) * | 2021-10-18 | 2022-01-18 | 浙江省水利河口研究院(浙江省海洋规划设计研究院) | Method for observing sand content under strong tidal bore condition |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10253355A (en) * | 1997-03-11 | 1998-09-25 | Unyusho Daisan Kowan Kensetsu Kyokucho | Ultrasonic type pulse height meter |
| CN202320724U (en) * | 2011-10-31 | 2012-07-11 | 国家海洋局南海工程勘察中心 | Strong ocean current resistant main and auxiliary double-buoy anchoring system |
| CN202574571U (en) * | 2012-04-17 | 2012-12-05 | 浙江省河海测绘院 | Flow measuring platform |
| US20130115002A1 (en) * | 2010-07-07 | 2013-05-09 | Alan Dennis Kirkby | Underwater oil and gas collection system |
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2013
- 2013-07-26 CN CN201310323973.4A patent/CN103411591B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10253355A (en) * | 1997-03-11 | 1998-09-25 | Unyusho Daisan Kowan Kensetsu Kyokucho | Ultrasonic type pulse height meter |
| US20130115002A1 (en) * | 2010-07-07 | 2013-05-09 | Alan Dennis Kirkby | Underwater oil and gas collection system |
| CN202320724U (en) * | 2011-10-31 | 2012-07-11 | 国家海洋局南海工程勘察中心 | Strong ocean current resistant main and auxiliary double-buoy anchoring system |
| CN202574571U (en) * | 2012-04-17 | 2012-12-05 | 浙江省河海测绘院 | Flow measuring platform |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945201A (en) * | 2021-10-18 | 2022-01-18 | 浙江省水利河口研究院(浙江省海洋规划设计研究院) | Method for observing sand content under strong tidal bore condition |
| CN113945201B (en) * | 2021-10-18 | 2024-04-02 | 浙江省水利河口研究院(浙江省海洋规划设计研究院) | Method for observing sand content under strong surge condition |
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| CN103411591B (en) | 2015-12-02 |
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