ESTIMATION METHOD AND SYSTEM BY INTRINSIC ORTHOGONAL DECOMPOSITION OF PLANNED RAINFALL WAVEFORM IN CITY

To provide an estimation method and a system by an intrinsic orthogonal decomposition of a planned rainfall waveform in a city.SOLUTION: An estimation method comprises: a step 1 of determining duration time of planed rainfall and a time step to collect rainfall data; a step 2 of selecting a rainfall...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: XU JING, DENG LIANGKUN, LIANG CHANGMEI, ZHAO YE, ZHANG XIANG, XIONG FENG, LIU SHUYING, GONG LI
Format: Patent
Sprache:eng ; jpn
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:To provide an estimation method and a system by an intrinsic orthogonal decomposition of a planned rainfall waveform in a city.SOLUTION: An estimation method comprises: a step 1 of determining duration time of planed rainfall and a time step to collect rainfall data; a step 2 of selecting a rainfall sample; a step 3 of calculating frequency order on the selected rainfall sample to determine a recurrence period of the planed rainfall, and a planed rainfall amount; a step 4 of performing intrinsic orthogonal decomposition on the sample to obtain primary modes of a rainfall field and corresponding time coefficients; a step 5 of determining a peak position of the planed rainfall and a trend of a rainfall waveform on the time coefficient of the first primary mode, and selecting a reconstruction template; a step 6 of selecting the primary mode, and reconstructing a rainfall waveform according to the reconstruction template; and a step 7 of calculating the planned rainfall by expanding or contracting a reconstructed result by the same magnification based on the planned rainfall amount.SELECTED DRAWING: Figure 1 【課題】都市における計画降雨波形の固有直交分解による推計方法及びシステムを提供する。【解決手段】推計方法は、計画降雨の継続時間及び時間ステップを決定し、降雨資料を収集するステップ1と、降雨サンプルを選定するステップ2と、選定された降雨サンプルについて頻度順位を算出し、計画降雨の再現期間、計画降雨量を決定するステップ3と、サンプルに対して固有直交分解を行い、降雨場の主要モード及び対応する時間係数を得るステップ4と、第1主要モードの時間係数に基づいて計画降雨のピーク位置、降雨波形の傾向を決定し、再構成テンプレートを選択するステップ5と、主要モードを選定して再構成テンプレートに従って降雨波形を再構成するステップ6と、再構成結果を計画降雨量に基づいて同じ倍率で拡大又は縮小して計画降雨を算定するステップ7と、を含む。【選択図】図1