What is the physiology losing dehydration from brackish?

if you drink salt sea you get desiccated. but doesnt salt retains river? by osmosis if you take surrounded by alot of salt, you should be capable of keep alot of wet right? so do you pee out all the brackish and fluid from your body follows?What is the physiology losing dehydration from brackish?
Two mechanisms:
1) High saline intake in your gut draws hose into your gut (osmosis) which you then excrete.
2) High saline in your blood, draws hose down into your blood = higher blood volume. Kidneys detect superior blood volume (by glomerular flow rate) and excrete excess salt + sea. Therefore a higher volume of blood = more wet excreted. Higher salt excretion = more wet following it into the kidneys and is excreted.

Both result in dehydration
Well to be honest, you sort of answered your own interrogate...not to be sarcastic. Salt retains marine (any liquid), which dries out your body, so basically no. Taking contained by salt will do the complete different; it will dry you out. This will cause you to become more thirsty. Therefore yes, you will pee most of it out.
By increasing saline concentration water will want to follow the saline. Through principles of osmosis, concentrations want to be balanced. Hence, a elevated concentration of salt is unfavorable and marine will rush in to decline said concentration. Generally when there is a illustrious salt concentration contained by interstitial fluid (outside cells), water will move out of the cell into the intersitial fluid thus cause your cells to shrink. When the cell shrinkage occur it can lead to cell demise.
dont confuse iodize brackish with oceanic brackish.