JP4580245B2 - Drift sand flow analysis system and drift sand flow analysis method - Google Patents

Drift sand flow analysis system and drift sand flow analysis method Download PDF

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JP4580245B2
JP4580245B2 JP2005007625A JP2005007625A JP4580245B2 JP 4580245 B2 JP4580245 B2 JP 4580245B2 JP 2005007625 A JP2005007625 A JP 2005007625A JP 2005007625 A JP2005007625 A JP 2005007625A JP 4580245 B2 JP4580245 B2 JP 4580245B2
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本発明は、海、河または池等の水中における漂砂の流動を解析するための漂砂流動解析システム及び漂砂流動解析方法の改良に関する。   The present invention relates to an improvement of a drift sand flow analysis system and a drift sand flow analysis method for analyzing drift sand flow in water such as a sea, a river or a pond.

海、河または池等の水中の砂の動き即ち漂砂に関するデータは、護岸や防波堤等の構造物の計画、設計及び施工等の基礎資料としてきわめて重要である。このため従来では、調査海域の砂を採取し、この砂に蛍光塗料を塗布して蛍光サンプル砂とし、この蛍光サンプル砂を移動基点としたい定点に定量散布し、定点周辺にメッシュ状に設けた調査点において時間経過とともに蛍光サンプル砂を回収して計数し、移動基点からの砂の移動状況について解析を行う方法が採用されていた。   Data on the movement of sand in the sea, rivers, ponds, etc., that is, drifting sand, is extremely important as basic data for planning, design and construction of structures such as seawalls and breakwaters. For this reason, conventionally, sand in the survey area is collected, fluorescent paint is applied to this sand to form fluorescent sample sand, this fluorescent sample sand is quantitatively dispersed at fixed points to be used as moving base points, and meshed around the fixed points. A method was adopted in which the fluorescent sample sand was collected and counted over time at the survey point, and the sand movement from the moving base point was analyzed.

また、下記特許文献１には、複数の地点から採取したサンプル砂にＸ線を照射し、サンプル砂を構成する元素の中から選定した５元素に対してそれぞれの元素毎に発生する固有の測定量を測定し、この測定量をそれぞれの採取地点間で相互に比較して砂の移動方向を判定する方法が開示されている。
特開平７−２８６８６９号公報 In Patent Document 1 below, sample sand collected from a plurality of points is irradiated with X-rays, and specific measurements generated for each element with respect to five elements selected from the elements constituting the sample sand. A method is disclosed in which an amount is measured and the measured amount is compared with each other between the sampling points to determine the direction of sand movement.
Japanese Patent Laid-Open No. 7-286869

しかし、上記従来の技術においては、海浜の無い港湾等でサンプル砂を確保することが困難であり、また海浜があってもサンプル砂の確保に時間がかかるという問題があった。   However, the above-described conventional technique has a problem that it is difficult to secure sample sand in a harbor without a beach, and it takes time to secure sample sand even if there is a beach.

また、蛍光サンプル砂に使用できる色の数は通常５〜６色であり、散布できる地点の数を多くできない上、複数回散布する場合に、各回の散布毎の蛍光サンプル砂を区別することが困難であり、回収した蛍光サンプル砂の計数も不正確になるという問題もあった。   In addition, the number of colors that can be used for the fluorescent sample sand is usually 5 to 6, and the number of spots that can be spread cannot be increased. In addition, when spraying multiple times, it is possible to distinguish the fluorescent sample sand for each spray. There is also a problem that the counting of the collected fluorescent sample sand is difficult and the counting is inaccurate.

さらに、サンプル砂にＸ線を照射する作業は現在制限されており、簡易な漂砂流動解析ができないという問題もある。   Furthermore, the work of irradiating the sample sand with X-rays is currently limited, and there is a problem that simple sand drift flow analysis cannot be performed.

本発明は、上記従来の課題に鑑みなされたものであり、その目的は、サンプル砂の散布場所に制限がなく、簡易且つ正確に漂砂流動解析を行える漂砂流動解析システム及び漂砂流動解析方法を提供することにある。   The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a sand drifting flow analysis system and a sand drifting flow analysis method capable of simply and accurately performing sand drifting flow analysis without any restrictions on the location where sample sand is dispersed. There is to do.

上記目的を達成するために、本発明は、漂砂流動解析システムであって、所定の識別情報を発生する識別情報発生手段を含み、海、河または池等の水中に散布される人工砂と、海、河または池等の水底から採取され、前記人工砂が含まれる土砂の中から前記人工砂を選別し回収する回収手段と、前記回収された人工砂に含まれる識別情報発生手段が発生する識別情報を検出する識別情報検出手段と、前記検出された識別情報に基づいて、漂砂の移動方向を解析する解析手段と、を備えることを特徴とする。   In order to achieve the above object, the present invention is a drift sand flow analysis system, including identification information generating means for generating predetermined identification information, and artificial sand dispersed in water such as the sea, river or pond, Collecting means for selecting and collecting the artificial sand from earth and sand collected from the bottom of the sea, river or pond and containing the artificial sand, and identification information generating means contained in the collected artificial sand are generated. It is characterized by comprising identification information detecting means for detecting identification information, and analysis means for analyzing the moving direction of sand drift based on the detected identification information.

ここで、上記識別情報発生手段が発生する識別情報には、人工砂の散布日時、散布場所及び固体識別番号を含むのが好適である。また、上記識別情報発生手段はＩＣタグにより構成されているのが好適である。   Here, it is preferable that the identification information generated by the identification information generation means includes the artificial sand application date and time, the application location, and the solid identification number. The identification information generating means is preferably constituted by an IC tag.

また、上記人工砂は、散布場所の水底に存在する自然砂と同程度の大きさ及び重量であるのが好適である。   Moreover, it is preferable that the artificial sand has the same size and weight as natural sand existing on the bottom of the spraying place.

また、上記解析手段は、漂砂の流動範囲を所定の面積に区分したメッシュ毎に回収された人工砂の散布日時、散布場所及び固体識別番号に基づいて漂砂の移動方向を解析するのが好適である。   Further, it is preferable that the analyzing means analyzes the moving direction of the drift sand based on the spraying date and time, the spraying location and the solid identification number of the artificial sand collected for each mesh in which the drifting sand flow range is divided into a predetermined area. is there.

また、本発明は、漂砂流動解析方法であって、所定の識別情報を発生する識別情報発生手段を含む人工砂を、海、河または池等の水中に散布し、海、河または池等の水底から採取され、前記人工砂が含まれる土砂の中から前記人工砂を選別して回収し、前記回収された人工砂に含まれる識別情報発生手段が発生する識別情報を検出し、前記検出された識別情報に基づいて、漂砂の移動方向を解析することを特徴とする。   Further, the present invention is a drift sand flow analysis method, wherein artificial sand including identification information generating means for generating predetermined identification information is dispersed in water such as a sea, a river or a pond, and The artificial sand is collected from the earth and sand collected from the bottom of the water, and the identification information generated by the identification information generating means included in the collected artificial sand is detected and detected. The moving direction of the drift sand is analyzed based on the identified information.

本発明によれば、サンプル砂として所定の識別情報を発生する識別情報発生手段を含む人工砂を使用することにより、サンプル砂の散布場所に制限がなく、簡易且つ正確に漂砂流動解析を行える漂砂流動解析システム及び漂砂流動解析方法を実現できる。   According to the present invention, by using artificial sand including identification information generating means for generating predetermined identification information as sample sand, there is no restriction on the place where the sample sand is dispersed, and sand drift flow analysis can be performed simply and accurately. A flow analysis system and a drift sand flow analysis method can be realized.

以下、本発明を実施するための最良の形態（以下、実施形態という）を、図面に従って説明する。   Hereinafter, the best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described with reference to the drawings.

図１には、本発明にかかる漂砂流動解析システムに使用される人工砂の構成図が示される。図１において、人工砂１０は、所定の識別情報を発生する識別情報発生装置１２を含んでいる。この識別情報発生装置１２としては、例えばＩＣタグ（ＲＦＩＤ）等を使用することができる。ＩＣタグは識別情報を記憶しており、外部の適宜な通信装置（リーダ）と通信を行って、該通信装置に上記識別情報を送信する。これにより、適宜なリーダにより、簡易に識別情報を読み出すことができる。上記識別情報としては、例えば人工砂１０を海、河または池等における所定地点の水中に散布した日時である散布日時、上記人工砂１０の散布場所を表すグループ番号及び各人工砂１０の固体識別番号等の情報を含む。また、人工砂１０は、金属体１４も含んでいる。この金属体１４は、例えば鉄等の磁石にひきつけられる物質で構成される。以上に述べた識別情報発生装置１２及び金属体１４は、被覆体１６により被覆され、防水される。この被覆体１６は、例えば生分解性プラスチック等で構成するのが自然環境への負荷低減の観点から好適である。   FIG. 1 shows a configuration diagram of artificial sand used in the drift sand flow analysis system according to the present invention. In FIG. 1, the artificial sand 10 includes an identification information generating device 12 that generates predetermined identification information. For example, an IC tag (RFID) can be used as the identification information generating device 12. The IC tag stores identification information, communicates with an appropriate external communication device (reader), and transmits the identification information to the communication device. Thereby, the identification information can be easily read out by an appropriate reader. As the identification information, for example, the spraying date and time, which is the date and time when the artificial sand 10 is sprayed into the water at a predetermined point in the sea, river, pond, etc., the group number indicating the spraying location of the artificial sand 10 and the solid identification of each artificial sand 10 Includes information such as numbers. The artificial sand 10 also includes a metal body 14. The metal body 14 is made of a material attracted to a magnet such as iron. The identification information generating device 12 and the metal body 14 described above are covered with a covering body 16 and waterproofed. The covering 16 is preferably made of, for example, a biodegradable plastic from the viewpoint of reducing the load on the natural environment.

上記人工砂１０の大きさは、散布地点における自然砂と同程度の大きさにすればよいが、例えば最長部の長さを５ｍｍ以下とするのがよく、特に１ｍｍ以下とするのがよい。また、人工砂１０の重量も、散布地点における自然砂の重量と同程度にすればよい。なお、本実施形態では、人工砂１０を球形として表現しているが、必ずしも球形である必要はない。散布地点における自然砂と同程度の大きさ及び重量であれば、自然砂に類する様々な形状にて構成することが可能である。   The size of the artificial sand 10 may be the same size as the natural sand at the spraying point. For example, the length of the longest part is preferably 5 mm or less, and particularly preferably 1 mm or less. Further, the weight of the artificial sand 10 may be approximately the same as the weight of natural sand at the spraying point. In the present embodiment, the artificial sand 10 is expressed as a sphere, but it is not necessarily required to be a sphere. If it is the same size and weight as natural sand at the spraying point, it can be configured in various shapes similar to natural sand.

以上に述べた人工砂１０は、工場で大量生産が可能であるので、サンプル砂の確保を容易にすることができる。また、識別情報に散布場所を表すグループ番号を含むので、散布場所の識別が容易であり、散布できる地点の数に上限がない。また、識別情報に固体識別番号が含まれるので、同一地点で複数回散布を行っても、各回の散布毎の人工砂１０を容易に区別することができる。   Since the artificial sand 10 described above can be mass-produced at a factory, it is possible to easily secure sample sand. Further, since the identification information includes the group number representing the spraying place, it is easy to identify the spraying place and there is no upper limit to the number of spots that can be sprayed. Further, since the identification information includes the solid identification number, the artificial sand 10 for each spraying can be easily distinguished even when spraying a plurality of times at the same point.

本実施形態にかかる漂砂流動解析システムでは、上記人工砂１０を海、河または池等における所望の地点の水中に散布し、漂砂の流動範囲すなわち散布された人工砂１０が水の流れにより流動する範囲を所定の面積に区分したメッシュ毎に人工砂１０を回収してその識別情報を検出する。図２に、土砂の採取装置の構成例を示す。   In the drift sand flow analysis system according to the present embodiment, the artificial sand 10 is dispersed in the water at a desired point in the sea, river, pond, etc., and the drifting sand flow range, that is, the dispersed artificial sand 10 flows by the flow of water. The artificial sand 10 is collected for each mesh whose range is divided into a predetermined area, and the identification information is detected. FIG. 2 shows a configuration example of the earth and sand collecting device.

図２において、各メッシュ毎の水底に存在する土砂１８を吸引管２０及びポンプ２２により吸引して採取する。この土砂１８には人工砂１０が含まれている。このように、人工砂１０を含む土砂１８をポンプ２２等により吸引して採取するので、水深の深い場所でも安全且つ容易に土砂１８を採取することができる。なお、人工砂１０の散布位置あるいは各メッシュ毎の採取位置は、例えばＧＰＳ衛星信号に基づいて算出した、散布に使用する機器あるいは採取装置の位置情報を用いて決定するのが好適である。   In FIG. 2, earth and sand 18 existing on the bottom of each mesh is sucked and collected by a suction pipe 20 and a pump 22. This earth and sand 18 includes artificial sand 10. Thus, since the earth and sand 18 including the artificial sand 10 is sucked and collected by the pump 22 or the like, the earth and sand 18 can be collected safely and easily even at a deep water location. It should be noted that the spraying position of the artificial sand 10 or the sampling position for each mesh is preferably determined using the position information of the device or sampling device used for spraying calculated based on, for example, GPS satellite signals.

図２の採取装置により採取された土砂１８は篩２４、２６にかけられ、土砂１８に含まれる大粒径粒子１８ａ及び小粒径粒子１８ｂが篩分けられて篩２６の上に人工砂１０及びこれとほぼ同粒径の土砂１８が残る。   The earth and sand 18 collected by the collecting device of FIG. 2 is passed through sieves 24 and 26, and the large particle diameter particles 18a and the small particle diameter particles 18b contained in the earth and sand 18 are sieved to form artificial sand 10 on the sieve 26 and this. As a result, earth and sand 18 having substantially the same particle size remains.

図３には、人工砂１０の選別手段の構成例が示される。図３において、選別用板２８の上に、上記篩２６の上に残った土砂１８と人工砂１０とを乗せ、選別用板２８の下から磁石３０を接近させて人工砂１０を土砂１８から分離し選別する。人工砂１０には、図１で説明した通り、金属体１４が含まれているので、磁石３０により土砂１８から分離することができる。これにより、人工砂１０が回収できる。   FIG. 3 shows a configuration example of the selecting means for the artificial sand 10. In FIG. 3, the earth and sand 18 remaining on the sieve 26 and the artificial sand 10 are placed on the sorting board 28, and the artificial sand 10 is moved from the earth and sand 18 by approaching the magnet 30 from below the sorting board 28. Separate and sort. Since the artificial sand 10 includes the metal body 14 as described with reference to FIG. 1, the artificial sand 10 can be separated from the earth and sand 18 by the magnet 30. Thereby, artificial sand 10 can be collected.

以上に述べた人工砂１０の採取装置及び選別手段により本発明にかかる回収手段が構成される。   The recovery means according to the present invention is constituted by the sampling device and the selection means of the artificial sand 10 described above.

図４には、人工砂１０の識別情報を検出するための識別情報検出装置の構成例が示される。図４において、上記選別手段により選別、回収された人工砂１０は、矢印Ａ方向に転がされつつリーダ３２の下を通過する。リーダ３２では、人工砂１０に含まれる識別情報発生装置１２としてのＩＣタグから所定の識別情報を読み取り、散布日時及びグループ番号毎に計数する。このように、リーダ３２によりＩＣタグから所定の識別情報を読み取ることにより、人工砂１０の計数等を正確に行うことができる。なお、後述する解析装置３４に読み取った識別情報を送り、解析装置３４で人工砂１０の計数を行ってもよい。   FIG. 4 shows a configuration example of an identification information detection apparatus for detecting identification information of the artificial sand 10. In FIG. 4, the artificial sand 10 sorted and collected by the sorting means passes under the leader 32 while being rolled in the direction of arrow A. The reader 32 reads predetermined identification information from an IC tag as the identification information generating device 12 included in the artificial sand 10 and counts it for each spraying date and time and group number. In this way, by reading predetermined identification information from the IC tag by the reader 32, the artificial sand 10 can be accurately counted. In addition, the identification information read may be sent to the analysis device 34 described later, and the artificial sand 10 may be counted by the analysis device 34.

識別情報検出装置により読み取られた識別情報は、パーソナルコンピュータ等で構成される解析装置３４に送られる。解析装置３４では、各メッシュ毎に回収された人工砂１０の識別情報に含まれる散布日時、グループ番号及び固体識別番号に基づいて漂砂の移動方向を解析する。   The identification information read by the identification information detection device is sent to the analysis device 34 constituted by a personal computer or the like. The analysis device 34 analyzes the moving direction of the sand drift based on the spray date and time, the group number, and the solid identification number included in the identification information of the artificial sand 10 collected for each mesh.

具体的には、各メッシュにおける人工砂１０のグループ別（散布場所別）採取率、混合比を算出し、水の流動すなわち漂砂の流れの方向、流速、滞留時間等を解析する。ここで、グループ別採取率とは、グループ番号で表される各散布地点において散布された人工砂１０の数に対する、各メッシュ毎に回収された同じグループの（同じ散布地点から散布された）人工砂１０の数の割合をいう。また、混合比とは、各メッシュ毎に回収された、各グループ番号を有する人工砂１０の混合割合をいう。   More specifically, the sampling rate and the mixing ratio of artificial sand 10 in each mesh are calculated for each group (spreading place) and the mixing ratio, and the flow of water, that is, the direction of flow of drift sand, flow velocity, residence time, and the like are analyzed. Here, the collection rate by group is the number of artificial sand 10 sprayed at each spray point represented by the group number, and the same group collected for each mesh (sprayed from the same spray point). The ratio of the number of sand 10 is said. The mixing ratio refers to the mixing ratio of the artificial sand 10 having each group number collected for each mesh.

次に、漂砂の流れの方向は、同じグループ番号を有する人工砂１０が回収されたメッシュ同士を最短距離で結ぶことにより、漂砂の移動経路の方向を推定して求める。また、流速は、上記漂砂の流れの方向を求める際に、当該人工砂１０の散布場所から回収されたメッシュまでの移動距離も求めておき、散布日時から回収日時までの時間経過で移動距離を除算することにより人工砂１０の平均移動速度として求める。この場合、例えばある散布場所から遠距離にあるメッシュにおいて、当該散布場所を表すグループ番号を有する人工砂１０の混合比が高い場合には、当該散布場所からそのメッシュまでの流速が高いと判断される。さらに、滞留時間は、同じメッシュにおいて採取された人工砂１０のグループ間の混合比が安定している時間から推定する。   Next, the direction of the drift sand flow is obtained by estimating the direction of the drift sand movement path by connecting the meshes from which the artificial sand 10 having the same group number is collected with the shortest distance. In addition, when obtaining the flow direction of the drift sand, the flow velocity is also obtained by calculating the moving distance from the spraying place of the artificial sand 10 to the collected mesh, and the moving distance from the spraying date to the collecting date. The average moving speed of the artificial sand 10 is obtained by dividing. In this case, for example, when the mixing ratio of the artificial sand 10 having the group number representing the spraying place is high in a mesh far away from the spraying place, it is determined that the flow velocity from the spraying place to the mesh is high. The Furthermore, the residence time is estimated from the time when the mixing ratio between the groups of artificial sand 10 collected in the same mesh is stable.

図５には、以上に述べた本発明にかかる漂砂流動解析システムを使用した漂砂流動解析方法の工程図が示される。図５において、まず海、河または池等における所定地点の水中に人工砂１０を散布する（Ｓ１）。   FIG. 5 shows a flow chart of the sand drift flow analysis method using the sand drift flow analysis system according to the present invention described above. In FIG. 5, first, artificial sand 10 is sprayed into the water at a predetermined point in the sea, river or pond (S1).

散布された人工砂１０は、水の流れに従い流動して行くので、その流動範囲すなわち漂砂の流動範囲を上述したメッシュに区分し、所定時間経過後、各メッシュ毎に水底から人工砂１０を含む土砂を採取する。この採取には、例えば図２で述べたポンプ２２等を使用する（Ｓ２）。   Since the dispersed artificial sand 10 flows according to the flow of water, the flow range, that is, the flow range of the drift sand is divided into the meshes described above, and after a predetermined time, the artificial sand 10 is included from the bottom of the water for each mesh. Collect earth and sand. For this collection, for example, the pump 22 or the like described in FIG. 2 is used (S2).

次に、図３で述べた磁石等を使用して、Ｓ２で採取した土砂の中から人工砂１０を回収する。この人工砂１０の回収は、上記メッシュ毎に行う（Ｓ３）。   Next, the artificial sand 10 is recovered from the earth and sand collected in S2 by using the magnet described in FIG. The artificial sand 10 is collected for each mesh (S3).

上記回収した人工砂１０は、図４で述べたリーダ３２により識別情報が読み出される（Ｓ４）。読み出された識別情報は解析装置３４に送られ、解析装置３４が上述した手順により漂砂の流れの方向、流速、滞留時間等の流動解析を行う（Ｓ５）。   Identification information is read from the collected artificial sand 10 by the reader 32 described in FIG. 4 (S4). The read identification information is sent to the analysis device 34, and the analysis device 34 performs a flow analysis such as the direction of the drift sand flow, the flow velocity, and the residence time by the above-described procedure (S5).

図６（ａ）、（ｂ）、（ｃ）には、本発明にかかる漂砂流動解析システムによる解析結果の例が示される。図６（ａ）に示されたＮｏ．１、Ｎｏ．２、Ｎｏ．３、Ｎｏ．４は、人工砂１０の識別情報発生装置１２に記憶されたグループ番号の例であり、それぞれ４個所の散布場所Ｓｔ１、Ｓｔ２、Ｓｔ３、Ｓｔ４を表している。また、時期を変えて複数回散布する場合には、合わせて散布日時を記憶させることも可能である。図６（ａ）、（ｂ）、（ｃ）において、図の上方が海の沖側（潮上）あるいは河川の上流側（川上）に、下方が海の浜側（潮下）あるいは河川の下流側（川下）に相当しており、人工砂１０の散布は潮上あるいは川上から行う。上記散布場所から散布された人工砂１０は、漂砂の流動範囲３６内に流動し、分散される。この漂砂の流動範囲３６は、上述した所定の面積のメッシュ３８に区分されている。なお、図６（ａ）、（ｂ）、（ｃ）においては、各散布場所から散布される人工砂１０を、これを表す図形を異ならせて区別している。   6 (a), 6 (b), and 6 (c) show examples of analysis results obtained by the drift sand flow analysis system according to the present invention. No. 1 shown in FIG. 1, no. 2, no. 3, no. 4 is an example of the group number stored in the identification information generating device 12 of the artificial sand 10, and represents four spraying locations St1, St2, St3, St4, respectively. In addition, when spraying a plurality of times at different times, it is also possible to store the spraying date and time. 6 (a), (b), and (c), the upper part of the figure is on the offshore side (tide) or the upstream side of the river (upstream), and the lower part is on the beach side (tide) or the river. It corresponds to the downstream side (downstream), and the artificial sand 10 is sprayed from the tide or upstream. The artificial sand 10 sprayed from the spraying place flows and is dispersed in the drifting sand flow range 36. The drifting sand flow range 36 is divided into the mesh 38 having a predetermined area described above. In FIGS. 6A, 6B, and 6C, the artificial sand 10 sprayed from each spraying place is distinguished by different graphics.

上記４個所の散布場所から対応するグループ番号を有する人工砂１０を所定数散布すると、散布から２時間後には、図６（ａ）に示されるように人工砂１０が流動し、分布する。この分布は、各メッシュ３８から人工砂１０を回収し、人工砂１０の有するグループ番号毎に計数することにより求めることができる。   When a predetermined number of artificial sands 10 having corresponding group numbers are sprayed from the four spraying locations, the artificial sand 10 flows and is distributed as shown in FIG. This distribution can be obtained by collecting the artificial sand 10 from each mesh 38 and counting each group number of the artificial sand 10.

この後さらに２時間経過（散布から４時間経過）したときの人工砂１０の分布状況が図６（ｂ）に示される。この分布状況も、図６（ａ）の場合と同様に求められる。   FIG. 6 (b) shows the distribution of the artificial sand 10 when 2 hours have passed (4 hours have passed since spraying). This distribution situation is also obtained in the same manner as in FIG.

以上に述べた図６（ａ）、（ｂ）の人工砂１０の分布状況に基づき、解析装置３４が漂砂の流れの方向、流速、滞留時間等を解析した結果が図６（ｃ）に示される。図６（ｃ）では、実線４０で示される流れが最も速い流速の流れであり、一点鎖線４２で示される流れが中程度の流速の流れであり、破線４４で示される流れが最も遅い流速の流れである。これらの線分は、図６（ａ）、（ｂ）を含む複数回の解析結果を基に、同一グループ番号に対するグループ別採取率の高いメッシュ間を結び、これらメッシュ間における流速の大きさに応じて線種別を変えてベクトル表示したものである。   FIG. 6C shows the result of the analysis device 34 analyzing the flow direction, the flow velocity, the residence time, etc. of the drifting sand based on the distribution state of the artificial sand 10 in FIGS. 6A and 6B described above. It is. In FIG. 6C, the flow indicated by the solid line 40 is the flow having the highest flow velocity, the flow indicated by the alternate long and short dash line 42 is the flow having the medium flow velocity, and the flow indicated by the broken line 44 is the flow having the slowest flow velocity. It is a flow. These line segments connect meshes with a high collection rate by group for the same group number based on the results of multiple analyzes including FIGS. 6 (a) and 6 (b), and indicate the flow velocity between these meshes. Accordingly, the line type is changed and the vector is displayed.

このように、本発明によれば、漂砂の流動範囲３６内の流れを簡易且つ正確に求めることができる。   Thus, according to the present invention, the flow within the drifting sand flow range 36 can be determined easily and accurately.

本発明にかかる漂砂流動解析システムに使用される人工砂の構成図である。It is a block diagram of the artificial sand used for the drift sand flow analysis system concerning this invention. 土砂の採取装置の構成例を示す図である。It is a figure which shows the structural example of the collection apparatus of earth and sand. 人工砂の選別手段の構成例を示す図である。It is a figure which shows the structural example of the selection means of artificial sand. 人工砂の識別情報を検出するための識別情報検出装置の構成例を示す図である。It is a figure which shows the structural example of the identification information detection apparatus for detecting the identification information of artificial sand. 本発明にかかる漂砂流動解析方法の工程図である。It is process drawing of the drift sand flow analysis method concerning this invention. 本発明にかかる漂砂流動解析システムによる解析結果の例を示す図である。It is a figure which shows the example of the analysis result by the drift sand flow analysis system concerning this invention.

符号の説明Explanation of symbols

１０ 人工砂、１２ 識別情報発生装置、１４ 金属体、１６ 被覆体、１８ 土砂、２０ 吸引管、２２ ポンプ、２４，２６ 篩、２８ 選別用板、３０ 磁石、３２ リーダ、３４ 解析装置、３６ 漂砂の流動範囲、３８ メッシュ、４０ 実線、４２ 一点鎖線、４４ 破線。   DESCRIPTION OF SYMBOLS 10 Artificial sand, 12 Identification information generator, 14 Metal body, 16 Cover body, 18 Earth and sand, 20 Suction pipe, 22 Pump, 24, 26 Sieve, 28 Sorting plate, 30 Magnet, 32 Reader, 34 Analysis device, 36 Drift sand Flow range, 38 mesh, 40 solid line, 42 dashed line, 44 broken line.

Claims (5)

ＩＣタグにより構成され、所定の識別情報を発生する識別情報発生手段と、鉄で構成された金属体とが生分解性プラスチックで被覆されており、海、河または池等の水中に散布される人工砂と、
海、河または池等の水底から採取され、前記人工砂が含まれる土砂の中から、磁石を使用して前記人工砂を選別し回収する回収手段と、
前記回収された人工砂に含まれる識別情報発生手段が発生する識別情報を検出する識別情報検出手段と、
前記検出された識別情報に基づいて、漂砂の移動方向を解析する解析手段と、
を備えることを特徴とする漂砂流動解析システム。 An identification information generating means that is configured by an IC tag and generates predetermined identification information and a metal body made of iron are covered with a biodegradable plastic and are dispersed in water such as the sea, river, or pond. Artificial sand,
A collection means for selecting and collecting the artificial sand using a magnet from the earth and sand collected from the bottom of the sea, river or pond, etc.
Identification information detecting means for detecting identification information generated by the identification information generating means included in the collected artificial sand;
Based on the detected identification information, analysis means for analyzing the moving direction of the drift sand,
A drift sand flow analysis system characterized by comprising: 請求項１記載の漂砂流動解析システムにおいて、前記識別情報発生手段が発生する識別情報には、人工砂の散布日時、散布場所及び固体識別番号を含むことを特徴とする漂砂流動解析システム。   The drift sand flow analysis system according to claim 1, wherein the identification information generated by the identification information generating means includes a date and time of spraying artificial sand, a spray location, and a solid identification number. 請求項１または請求項２記載の漂砂流動解析システムにおいて、前記人工砂は、散布場所の水底に存在する自然砂と同程度の大きさ及び重量であることを特徴とする漂砂流動解析システム。 The drift sand flow analysis system according to claim 1 or 2, wherein the artificial sand has a size and weight comparable to natural sand existing on a bottom of a spraying place . 請求項２または請求項３記載の漂砂流動解析システムにおいて、前記解析手段は、漂砂の流動範囲を所定の面積に区分したメッシュ毎に回収された人工砂の散布日時、散布場所及び固体識別番号に基づいて漂砂の移動方向を解析することを特徴とする漂砂流動解析システム。 The drift sand flow analysis system according to claim 2 or claim 3, wherein the analysis means includes a date and time of spraying artificial sand collected for each mesh obtained by dividing the flow range of the drift sand into a predetermined area, a spray location, and a solid identification number. A drift sand flow analysis system characterized by analyzing the direction of sand drift movement . ＩＣタグにより構成され、所定の識別情報を発生する識別情報発生手段と、鉄で構成された金属体とが生分解性プラスチックで被覆されて構成された人工砂を、海、河または池等の水中に散布し、
海、河または池等の水底から採取され、前記人工砂が含まれる土砂の中から磁石を使用して前記人工砂を選別して回収し、
前記回収された人工砂に含まれる識別情報発生手段が発生する識別情報を検出し、
前記検出された識別情報に基づいて、漂砂の移動方向を解析することを特徴とする漂砂流動解析方法。 An identification information generating means that is configured by an IC tag and generates predetermined identification information, and artificial sand that is formed by coating a metal body made of iron with a biodegradable plastic, such as a sea, a river, or a pond Spray in the water,
It is collected from the bottom of the sea, river or pond, etc., and the artificial sand is selected and collected from the earth and sand containing the artificial sand using a magnet.
Detecting identification information generated by the identification information generating means included in the collected artificial sand,
A drift sand flow analysis method, comprising: analyzing a moving direction of the drift sand based on the detected identification information .
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