A high salt intake can put the blood pressure up and cause chronic kidney disease, but that has no relation to sea level rise, from what I have found out.
Dear Michael Issigonis, thank you for your reply but you know that due to global warming sea level is rising day by day. The sea water enter into the river which is frequently used by the farmers and sometimes used for drinking by the mass population. Thank you. Palash.
It has been observed that the areas with higher salinity has greater prevalence of CKD compared to the areas with lower salinity, but it wasn't clearly expressed that salinity is a causative factor for the development of CKD.
Yes, since high salt intake is an important factor in both hypertension and CKD, higher salinity (NaCl or other Na salts) in drinking water will be associated with CKD.
Higher salt intake causes CKD in multiple ways like causing hypertension and related deterioration in kidney function, proteinuria etc.