JP7348429B2 - 浸りdas(水害危険区域表示手法) - Google Patents
浸りdas(水害危険区域表示手法) Download PDFInfo
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- JP7348429B2 JP7348429B2 JP2019099755A JP2019099755A JP7348429B2 JP 7348429 B2 JP7348429 B2 JP 7348429B2 JP 2019099755 A JP2019099755 A JP 2019099755A JP 2019099755 A JP2019099755 A JP 2019099755A JP 7348429 B2 JP7348429 B2 JP 7348429B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/40—Controlling or monitoring, e.g. of flood or hurricane; Forecasting, e.g. risk assessment or mapping
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Description
ここに 3.6:単位を合わせる係数
f :流出係数
r :流達時間内降雨強度(mm/hr)
a :排水区面積(km2)
aσ(y,x)+bσ(y)=σ(y,z)
ここにσ(x)はxの分散、σ(x,y)はxとyの共分散を示し、この連立方程式を解くことで、a,bが求められる。
(ア)氾濫容量が排水区の平均的な回帰斜面に平行に滞留するとして現時刻危険区域を表示する。
(イ)排水区周辺と水深の段差がある場合には排水区の氾濫容量の流出、流入容量を換算 する。
(ウ)排水区内の回帰斜面に湛水した総容量を排水区の標高の最も低い地点(大方は排水路下流端)からの水平湛水とする。
(エ)5分後までの流出計算を行い、氾濫容量を算定する。([図9]参照)
入容量として付加するものとし、逐次計算を行う。
排水口の詰まり状況や様々な水流のヘッドロス、また道路上の薄い流れも含めた流下能力とする。
Claims (1)
- 水害(内水、洪水、高潮、津波)の内、内水氾濫(下水道等氾濫)について、下水道等排水区内の地盤高群による回帰斜面を単位水深ずつ平行移動したときの回帰斜面と地盤高さの差分を累積した容量を求め、これにより[浸水深、浸水域]と[氾濫容量]との関係を予め求めておき、小流域の流達時間内降雨強度から合成合理式を用いて得た流出量が、小流域の下流端流下能力を超える量を氾濫容量として算出し、氾濫容量が排水区の平均的な回帰斜面に平行に氾濫するとして、以下の(ア)~(エ)を含み、
(ア)氾濫容量が排水区の平均的な回帰斜面に平行に氾濫、滞留するとして現時刻内水氾濫危険区域を表示する。
(イ)排水区周囲と水位の段差がある場合には排水区の氾濫容量の流出、流入容量を換算する。
(ウ)排水区内の回帰斜面に氾濫した総容量を排水区の標高の最も低い地点(大方は排水路下流端)からの水平湛水とする。
(エ)5分後まで流出計算を行い、氾濫容量を算定する。
以上の4段階の計算を5分毎に繰り返すことにより、時々刻々の内水危険区域、想定浸水深の経時変化を解析し、一方で外水(洪水、高潮、津波)に関しては、破堤を前提にし、観測(予測・想定)される外水位を堤内地へ水平に引き延ばし、その到達する範囲を外水氾濫危険区域とし、又その水平面と地盤高の差分を浸水想定深さとして、内水氾濫危険区域と合わせて表示する解析手法。」
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JP2019099755A JP7348429B2 (ja) | 2019-05-13 | 2019-05-13 | 浸りdas(水害危険区域表示手法) |
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JP2019099755A JP7348429B2 (ja) | 2019-05-13 | 2019-05-13 | 浸りdas(水害危険区域表示手法) |
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JP2020187105A JP2020187105A (ja) | 2020-11-19 |
JP7348429B2 true JP7348429B2 (ja) | 2023-09-21 |
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Families Citing this family (2)
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JP6908947B1 (ja) * | 2020-06-12 | 2021-07-28 | ニタコンサルタント株式会社 | リアルタイム内水氾濫浸水予測システム、リアルタイム内水氾濫浸水予測装置、リアルタイム内水氾濫浸水予測方法、リアルタイム内水氾濫浸水予測プログラム及びコンピュータで読み取り可能な記録媒体並びに記憶した機器 |
CN115169763B (zh) * | 2022-09-08 | 2022-11-29 | 广东广宇科技发展有限公司 | 一种内涝预测方法、数字孪生系统、电子设备及存储介质 |
Citations (1)
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JP2008184838A (ja) | 2007-01-30 | 2008-08-14 | Hokkaido River Disaster Prevention Research Center | ダム流入量予測装置、ダム流入量予測方法、およびダム流入量予測プログラム |
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JPH10268065A (ja) * | 1997-03-24 | 1998-10-09 | Nippon Hoso Kyokai <Nhk> | 降雨予測方法および降雨減衰警戒装置 |
JP3625367B2 (ja) * | 1997-12-25 | 2005-03-02 | 株式会社東芝 | 下水道システムの貯留設備運用支援装置 |
JP4082686B2 (ja) * | 2002-12-03 | 2008-04-30 | 財団法人河川情報センター | リアルタイム動的氾濫シミュレーションシステム |
JP2005128838A (ja) * | 2003-10-24 | 2005-05-19 | Foundation Of River & Basin Integrated Communications Japan | 簡易型洪水氾濫解析システム |
JP4799300B2 (ja) * | 2006-07-07 | 2011-10-26 | 株式会社東芝 | 監視システム |
JP4682178B2 (ja) * | 2007-05-31 | 2011-05-11 | 財団法人河川情報センター | 全国合成レーダ雨量を用いた分布型流出予測システム |
CN105160178B (zh) * | 2015-09-02 | 2016-08-24 | 国家电网公司 | 一种考虑降雨空间分布特征的水库流域子流域划分方法 |
KR20160110035A (ko) * | 2015-09-25 | 2016-09-21 | 유찬호 | 재해예측 시스템 |
JP6707500B2 (ja) * | 2017-09-01 | 2020-06-10 | 東急建設株式会社 | 河川水位予測システム |
CN108090618A (zh) * | 2017-12-25 | 2018-05-29 | 广州地理研究所 | 中小流域暴雨洪水因子与降雨强度的关系模型构建方法 |
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JP2008184838A (ja) | 2007-01-30 | 2008-08-14 | Hokkaido River Disaster Prevention Research Center | ダム流入量予測装置、ダム流入量予測方法、およびダム流入量予測プログラム |
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