CAJ | 학술논문

汛限水位分期控制能在不降低水库防洪标准的条件下提高水能资源利用效率，而洪水分期是汛限水位分期控制的前提，以三峡水库洪水资源高效利用为背景，在分析三峡水库上下游水文气象特征的基础上，根据水文序列的自相似性，由统计分析法确定了宜昌站洪水分期数目，并选择Db4为小波基，以Mallat算法为基础，提出了小波分维估计法计算模式并计算了宜昌站各分期的分维数，最后确定了三峡水库的汛期洪水分期。结果表明，以小波分维估计法划分的洪水分期与传统研究分期结果一致，但小波分维估计法计算简便，所得分维数结果稳定，表明小波分维估计法应用于洪水分期是可行的和有效的。
신한수위분기공제능재불강저수고방홍표준적조건하제고수능자원이용효솔，이홍수분기시신한수위분기공제적전제，이삼협수고홍수자원고효이용위배경，재분석삼협수고상하유수문기상특정적기출상，근거수문서렬적자상사성，유통계분석법학정료의창참홍수분기수목，병선택Db4위소파기，이Mallat산법위기출，제출료소파분유고계법계산모식병계산료의창참각분기적분유수，최후학정료삼협수고적신기홍수분기。결과표명，이소파분유고계법화분적홍수분기여전통연구분기결과일치，단소파분유고계법계산간편，소득분유수결과은정，표명소파분유고계법응용우홍수분기시가행적화유효적。
Adjusting flood control limited level in phases scientifically will improve water resources utilization ratio without abating the flood control standard of reservoir, and the reasonable partition of the stage in the flood season is the precondition of controlling the limited water level by stage. Therefore, on the background of Three Gorges Reservoir flood efficient utilization and on analyzing hydrological and meteorological characteristics of upstream and downstream of Three Gorges Reservoir, according to self-similarity of hydrological series, determining the number of flood season staged on the basis of statistical analytical method, choosing the Db4 wavelet and Mallat algorithm, the computation mode of wavelet fractal dimension estimation method is proposed and every stage＇s fractal dimension of Yichang gauging station is computed, then the final flood season staged is given. The results demonstrate the periods of Three Gorges Reservoir determined by adopting wavelet fractal dimension method are consistent with that from traditional method, but the fractal dimension result by former method is easier and more stable which ensuring the feasibility and validity of the wavelet fractal dimension method applying to the flood season staged and need deep study.