The objective of preliminary statistical analysis in hydrology is to examine the independence and stationarity of the data series. Rao and Hamid (2000) identified four major analysis which is independence and stationarity test, homogeneity test, and the outliers and trends test that required in hydrology analysis.
The test for independence and stationarity can be conducted using Wald-Wolfowitz method (WW-Test. The equations of this test is shown below:
The homogeneity test was used to test the hypothesis of two samples data. The test is conducted using The Mann and Whitney method.
The outliers test is important to smooth the data fitting distribution. Low and high outliers will give different effects on the analysis. Grubbs and Beck test is used to detect outliers based on the assumption of normality.
The distribution test is conducted to understand the behavior of hydrology time series data.The Mann-Kendall test is widely used to detect trends in hydrologic data. The Wilcoxon inversion Test (Kanji, 1993) is used to test if two random samples have the same frequency distribution.
Facebook Badge
Popular Posts
-
Since the December 2007, floods and stormwater management has become an increasingly important topic in Malaysia. Recently, there is ... -
This is the basic part of meteorology. Frontal Mechanisms A weather and precipitation formations largely depands with eith... -
As a basis, condensation is known as the physical process by which a gas becomes a liquid which is the opposite of evaporation. When ... -
This is my main references:- The Qur'an contains several references to natural phenomena but these references have clear purp... -
The hydrological cycle or water cycle is the most important of all natures cycles and it explains the global distribution and movement ... -
Some of important hydrological terms can be view here: Hydrology Terminology and Glossary http://water.usgs.gov/wsc/glossary.html Glo... -
What if a rainstorm dropped all of its water in a single giant drop? What we know... a raindrop is simply some air moisture conden... -
The “mechanism” by which air is lifted is nominally used to classify the type of precipitation. In general, there are 3 types of lifting m... -
Malaysia receives an average annual precipitation of about 3000 mm. The total average annual flow per year for Malaysia rivers is estimated ...
-
The magnitude of data (i.e. daily, 1-day, monthly, annual) is important in hydrology and water resources analysis. In hydrology analysis tho...
No comments:
Post a Comment