Prague, 1/5/05

Dear colleague,

I am also working a little bit in the nitrate pollution problems in
agricultural areas. I think that you have principally three options:

a) To investigate (by measurements, surveys, models etc.) the possible paths
of nitrate spreading from the suspect sources to the place of interest. Here
also the time pattern of pollution may be explanatory (e.g., the seasonal
variation) of nitrate concentrations in groundwater), as well as its
relation to water balance and groundwater table height.

b) To carry out a field experiment by adding additional sources of pollution
of a certain type of excluding them. Perhaps the real life has made several
such exeperiments for you (you may try to compare several different
locations in which the sources of nitrogen are different).

c) To use 15N as a tracer.

None of these option is simple and cheap, unfortunately.

With best regards,

Frantisek Dolezal

Ing. Frantisek Dolezal CSc. (Ph.D.)
Vyzkumny ustav melioraci a ochrany pudy
(Research Institute for Soil and Water Conservation)
Zabovreska 250
156 27 Praha 5 - Zbraslav
Czech Republic
phone 00-420-2-57921640
fax +420-2-57921246
E-mail: dolezal@...


----- Original Message -----
From: "husamb" <husamb@...>
To: <hydrologymodel@...>
Sent: Saturday, April 30, 2005 5:31 PM
Subject: [hydrologymodel] Nitrate in groundwater


> Hello colleuges,
> Is there a way to determine the source of nitrate in groundwater if it
> is from agricultural activities or wasterwater , landfill, ...etc?
>
>
> Thank you in advance
>