洪峰模數 的英文怎麼說
中文拼音 [hóngfēngmóshǔ]
洪峰模數
英文
peak discharge modulus-
The probability density function of net rainfall relative errors, flood peak discharge relative errors and the time error of the forecasted flood peak are calculated by the model developed
通過建立洪水預報誤差分佈的最大摘模型，計算出9座典型水庫洪水預報的凈雨相對誤差、洪峰流量相對誤差和峰現時間預報誤差的概率密度函數，並將其概率密度函數曲線與正態分佈曲線進行比較。In harnessed watershed, a is smaller and b is bigger, but they are contrary in no - harnessed watershed. the flood peak volume modulus and sediment transport modulus is also power function relationship. but parameter a and b is different largely in different watershed and the relativity is not well than relationship between runoff depth and sediment transport modulus
參數a 、 b可以反映流域有無治理的差異，參數a在有治理或部分治理的流域內均小於無治理流域；參數b在有治理流域內則較無治理流域偏大；流域次降雨洪峰流量模數與輸沙模數也為冪函數關系，但參數a 、 b在不同流域之間差別較大，其相關性不如徑流深與輸沙模數關系好。So a new method ? scale analysis method ( or called fractal analysis method ) is applied to study the flood of jialing river basin. the scaling hypotheses is applied to the relationship of annual maximum flood and drainage area. and basing on the scaling lognormal model with two parameters introduced by smith, a lognormal model with three parameters of flood is introduced to represent the scale effect of drainage area in annual flood peak distributions
在洪水區域分析中一般採用洪水指標法，但該法的基本假定與實際情況存在矛盾，因此本文採用一種新的分析方法? ?標度分析法（或稱為分形分析法）來研究洪峰的區域變化，將標度不變性引入年最大洪峰流量? ?匯流面積關系中，並將其用於嘉陵江流域的洪水，另外，本文在smith提出的具有標度性質的二參數對數正態分佈模型基礎上創造性地提出了三參數對數正態分佈模型來表徵年最大洪峰流量分佈中匯流面積的尺度影響。
分享友人