Effects of climate change are evident now on all walks of life. How it will affect the soil salinity and ground/surface water quality in Indian condition. Your frank opinion is invited.
Hi Sir,
Your question is quite interesting and my view are as follows,
1) if there is a drought loom condition persisted in the coastal tracts and whereby would be a saline water intrusion (i.e. Ghyben-Herberg) and consequent hike in saline content in the intact soil zone.
2) If climate condition changed from sub-arid to arid, then raise in temp renders enhanced salts content in the soil root zone besides scanty drainage conditions.
In my opinion,
data available for long term effect of climate change on GW quality and salinity is not enough. So it will be difficult put up a hypothesis.
Rather I believe
The soil salinity and GW changes are localised phenomenon, affecting smaller areas. Hence, compared to anthropogenic reasons, the climate change will play a insignificant role.
Let us see, what others are saying?
Dear Sarwan,
its really difficult to find a direct connection between CC and soil salinity as a direct factor. Instead you could check how the temperature trends behave for the last 30 yrs (or more). Then correlate the trends with evaporation rates. Some lab experiments should be made in order to see how salinity changes with time at different temperatures.
Good luck
CC correlates with Salinity in near future.However threats are Exploitation of water Resources.Salinity àlways theier because of earlier Green Revolution in India;Excess amount of Fertisers are in Soil Tank.. Fertile Top soil is because of very lomg process take decade of time.Major concerns are Deep Underground Sources.Number of Pollutants including soluble Inorganics.Population Explosion;almost six time more within Century.CC .more we see Human needs
The topic of my PhD thesis was exactly same but for Iran. It is very complex issue. But for areas like India it may be a bit simpler. Because agriculture in India is mostly rainfed while in Iran it is irrigated. Irrigation is dependent to management and each farmer used to apply its special kind of management.
You need to determine the relationships between soil salinity and climatic variables for current conditions, then you will be able to determine soil salinity under climate change scenarios.
There was a forum in Valencia Spain 2010 on behalf of FAO for this issue. The papers on that event were the first ones world wide and generally were qualitative not quantitative.
For irrigated agriculture there was no correlation between soil salinity and climatic variables while the changing environment had changed groundwater quality and depth. I had found a relationship between soil salinity in irrigated area, irrigation water quality and Leaching Fraction (LF). Then I was able to predict the future trend of soil salinity with changing irrigation water quality and under some scenarios for LF.
For irrigated agriculture there was no correlation between soil salinity and climatic variables while the changing environment had changed groundwater quality and depth. I had found a relationship between soil salinity in irrigated area, irrigation water quality and Leaching Fraction (LF). Then I was able to predict the future trend of soil salinity with changing irrigation water quality and under some scenarios for LF.
For irrigated agriculture there was no correlation between soil salinity and climatic variables while the changing environment had changed groundwater quality and depth. I had found a relationship between soil salinity in irrigated area, irrigation water quality and Leaching Fraction (LF). Then I was able to predict the future trend of soil salinity with changing irrigation water quality and under some scenarios for LF.
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