The diagram illustrates the stages nitrogen which it sediment in the groundwater of a city on the coast.
There is many human and industry activity that makes leaks nitrogen pollute the enviroment. One of these activity is the disposal in landfills that may contains numerous nitrogen from junks. Besides that, the other factories also don’t have an appropriate filter from it excretion, so that nitrogen could contaminate the ground. Domestic market and gardens may have role for this cycle due to the fertilizer and liquid water from household possibly seep in the ground. These three areas are highly contributed to provide nitrogen in groundwater.
The groundwater that contains a nitrogen flows toward the sea and it is discharged into the ocean. At the moment, levels nitrogen have slowly decreased by saltwater interface near coast. Afterwards, some nitrogen is taken up by particles in the soil and it is released back into the atmosphere having been oxidised by lightning and turn back in the ground from rainwater. The vegetation had been receiving nitrogen from rainwater and changes it to amonia, the process called nitrogen fixation.
Overall we can see that nitrogen enters the ground in a number of ways, then take towards the sea and released back in to the atmosphere having been oxidised by lighting, and coming back in the ground by rainwater. The cycles is then repated.