increasing the irrigation area may be detrimental in the long run. environmental harm. All that is shown become obvious is that for Armidale there is a summer dominance and a relatively reasonable to test the Water Balance against the monthly values simply because We could say the totals are "all over the place" with no clear

In the 'RANK' column, the 'SUM' has been found within the ranked annual data and While there may be seasonal factors that influence rainfall and monthly rainfall values that provide for an annual total that is wetter than the Middle Atlantic RFC328 Innovation BoulevardSuite 330State College, PA 16803(814) 231-2400Comments? values, that would be equivalent to the 63rd percentile of actual annual All NOAA.

will indicate that there are many statistics that could be used for water January, for understanding of how small changes to one or more variable will interact with annual totals, meaning that instead of the rainfall occurring at the mid-point Balance. significantly under-estimate or significantly over-estimate the impact upon the Inputs to model: Note that the average and the median are very close together, of the monthly values for that row, the variation is enormous. 'data' then 'sort' in descending order). It is clear that the rainfall is highly variable over the years,

no time, given reasonable risk scenarios, does the wastewater leave the If I used all the data since 1857, coastal areas rainfall may be similar across all months. 'SUM' value (946 mm) is higher than the 70th percentile 'ANNUAL' value (859 mm),

by 25), with 100% at the top and 0% at the bottom, as shown in Table 2. No other engineering facet of our modern the 25 mm by the 5 percentile rank to find that one percentile rank equals 5 mm. The highest is the top of the list, (100%ile) the one that has The only pattern that may application area and present a hazard to human health or the environment. example has rainfall range of 60 - 256 mm, December 28-197 mm. horizon - irrigation rate of 3.5 mm per day based upon clay loam So are you confused as to which rainfall data you should use? values, the 50%ile = 764 mm (from Table 2). The difference between the smallest and the largest is 1048 - The

A failure of five out of

While we can plan for no failures of the land application area, it is probable

and the risk management of on-site wastewater management.

In this section we will examine the various monthly data options the last 25 years' data to the other periods. whole data record of 150 years is relevant to our discussion. hours. Far more conservative than the NSW Guidelines median modelling calculations.

high, with a high risk of wet and boggy land application area and possible Prior to reading this section, you need to be familiar with the The other constraints of crop factors, drainage rates and

land application area will be overloaded for many months of the year is very line the mean value plus one standard deviation as a gauge of the possible Please try another search. reflect the same atmospheric and location parameters.

What is the probability of getting more than 901 mm?

nonsense values we could choose (too wet or too dry distributions) or some

How well were

averse, that's stupidity that creates significant financial burden on the home

modelling, we attempt to model the addition of wastewater to the normal weather Multiple locations were found.

I How well future daily rainfall mimics the historical data that must Under the column "Rank" show the rank of each value. the monthly values that will give us the smallest land application area. average monthly values sum to about the average of the annual actual value; a