🌍 Plain vs Coastal Area Water 1. Why is water fresh in plai
🌍 Plain vs Coastal Area Water
1. Why is water fresh in plains?
* Rainwater seeps into the ground and gets filtered
* Soil and rocks reduce dissolved salts
* Rivers and groundwater are continuously recharged
👉 So, less salt → freshwater
2. Why is water salty near sea coasts?
* Seawater already contains high amounts of salt
* It enters land (seawater intrusion)
* High evaporation removes water but leaves salt behind
👉 So, water becomes salty
🌊 How do freshwater and saltwater exist?
* They meet but do not fully mix
* Reason:
* Freshwater = lighter → stays above
* Saltwater = heavier → stays below
* A mixing zone forms in between
⚠️ When does saltwater spread more?
* Excessive groundwater pumping
* Drought conditions
👉 Saltwater moves inward and contaminates freshwater
📏 Important Rule (easy to remember)
👉 1 meter freshwater above sea level ≈ 40 meters saltwater below
🎯 Final Conclusion (in one line)
👉
Plains = filtered flowing water → fresh
Coastal areas = seawater influence salt → saline
Comments
No comments yet.