雅鲁藏布江年楚河江孜水文站水文特征值

1956-2000年，雅鲁藏布江年楚河江孜水文站多年来逐月的水文特征值（离差系数，偏差系数，不均匀系数）离差系数(Cv )：

□系列中各项值对其均值的相对离散程度的指标

□系列均方差与均值之比

□ Cv较大，说明系列中各项 的值对均值离散较大； Cv较小，说明系列各项的值同均值相差较小

式中：σ：均方差 ； x：水文变量

Ki：模比系数；n：变量系列长度

偏差系数(Cs )：

□系列中各项的值偏于均值左右的情况的相对指标

□若大于均值的各项值占优势称为正偏（Cs>0）

□若小于均值的各项值占优势称为负偏（Cs<0）

□当大于均值和小于均值的各项值都不偏时称为对称（Cs=0）

式中：σ：均方差 ； x：水文变量； n：变量系列长度

用于研究雅鲁藏布江水文特征分析。

From 1956 to 2000, monthly hydrological characteristic values (including coefficient of variation, coefficient of skewness, and coefficient of unevenness) were recorded at the Jiangzi Hydrological Station of the Nianchu River, a tributary of the Yarlung Zangbo River, over multiple years.

### Coefficient of Variation (Cv)
- A metric measuring the relative degree of dispersion of each value in a series around its mean
- The ratio of the standard deviation (σ) to the mean of the series
- A larger Cv indicates greater dispersion of values in the series around their mean; a smaller Cv indicates a smaller difference between each value in the series and its mean

Where: σ = standard deviation; x = hydrological variable; Ki = modulus ratio coefficient; n = length of the variable series

### Coefficient of Skewness (Cs)
- A relative metric reflecting the degree to which values in a series deviate to either side of the mean
- When values greater than the mean dominate, this is termed positive skewness (Cs > 0)
- When values smaller than the mean dominate, this is termed negative skewness (Cs < 0)
- When neither values greater than nor smaller than the mean are dominant, the series follows a symmetric distribution (Cs = 0)

Where: σ = standard deviation; x = hydrological variable; n = length of the variable series

This dataset is used for hydrological characteristic analysis of the Yarlung Zangbo River.

搜集汇总

背景与挑战

背景概述

该数据集包含雅鲁藏布江年楚河江孜水文站1956年至2000年逐月的水文特征值，如离差系数、偏差系数和不均匀系数，主要用于分析该区域的水文变化特征。数据来源于国家水文站，质量符合相关标准，通过订单审核流程获取。