Floods & Climate Change: Scientific Explanation – Kyun Aa Rahi Hai Itni Bhayanak Baadh?
Aaj ke daur mein baadh (floods) sirf ek kudrati aapda (natural disaster) nahi reh gayi hai. Iske peeche Climate Change aur Global Warming ka ek gehra scientific connection hai. Pichle kuch saalon mein humne dekha hai ki Bharat ke Uttarakhand, Himachal Pradesh aur Kerala jaise rajyon mein baadh ki teevrata (intensity) bahut badh gayi hai.
Is article mein hum samjhenge ki kaise badhta hua taapmaan (temperature) hamari nadiyon aur samundron ko gussa dila raha hai.
1. Global Warming aur Water Cycle Ka Bigadta Santulan
Science ke mutabiq, jaise-jaise dharti ka taapmaan badhta hai, hamara Water Cycle (Jal Chakra) tez ho jata hai. Iske peeche ek simple physics kaam karti hai:
- Evaporation (Vaashpikaran): Garam hawa zyada nami (moisture) soke rakhti hai. Science kehta hai ki har 1°C taapmaan badhne par hawa lagbhag 7% zyada moisture hold kar sakti hai.
- Heavy Precipitation: Jab ye nami bhari hawa thandi hoti hai, toh ye halki baarish ke bajaye ek saath bahut saara paani barsa deti hai, jise hum Cloudburst ya Extreme Rainfall kehte hain.
2. Glacier Melting: Pahadon Par Baadh Ka Khatra
Bharat ke liye sabse bada khatra Himalayan Glaciers ka pighalna hai. Climate change ki wajah se glaciers tezi se pighal rahe hain, jis se do tarah ki baadh aati hai:
- Flash Floods: Jab pighla hua paani tezi se nadiyon mein aata hai aur raste mein sab kuch tabaah kar deta hai.
- GLOF (Glacial Lake Outburst Flood): Pahadon par bani barf ki jheelein jab kamzor hokar toot-ti hain, toh neeche base ilakon mein tabaahi mach jati hai (Jaise Kedarnath 2013 mein hua tha).
3. Rising Sea Levels aur Coastal Flooding
Samudra ka star (sea level) do mukhya wajahon se badh raha hai:
- Melting Ice: Polar ice caps aur glaciers ka pighal kar samudra mein milna.
- Thermal Expansion: Garam hone par paani ke molecules failte (expand hote) hain, jis se volume badh jata hai.
Iska seedha asar Mumbai, Chennai aur Kolkata jaise shehron par pad raha hai. High tide ke samay ab in shehron mein pani bhar jana ek aam baat ho gayi hai.
4. Urban Flooding aur “Flash Floods” Ka Science
Pehle baarish mahinon tak dheere-dheere hoti thi, lekin ab “Short duration, high intensity” rainfall ka trend badh gaya hai.
- Concrete Jungles: Shehron mein har jagah concrete hone ki wajah se paani zameen ke andar nahi ja pata.
- Drainage Failure: Jab kai dinon ki baarish sirf kuch ghanton mein ho jati hai, toh purana drainage system use jhel nahi pata aur shehar doobne lagte hain.
5. Climate Change aur Monsoon Pattern mein Badlav
India ki kheti aur economy Monsoon par nirbhar hai. Lekin climate change ne monsoon ko “Unpredictable” bana diya hai:
- Dry vs Wet Spells: Kahin bilkul sookha (drought) pad raha hai, toh kahin ek hi din mein mahine bhar ki baarish ho rahi hai.
- More Cyclones: Arabian Sea aur Bay of Bengal mein cyclones ki frequency badh gayi hai, jo apne saath bhayanak baadh aur storm surges late hain.
6. Prevention: Baadh ke Khatre ko Kaise Kam Karein?
Hum climate change ko ek din mein nahi rok sakte, lekin baadh ke asar ko kam karne ke liye scientific tarike apna sakte hain:
- Afforestation: Nadiyon ke kinare ped lagana taaki mitti na bahe aur paani ki raftar kam ho.
- Wetland Restoration: Purane talabon aur jheelon ko dobara zinda karna taaki wo extra paani sokh sakein.
- Sponge Cities: Aise shehar design karna jo baarish ke paani ko filter karke zameen ke niche pahunchayein.
Conclusion
Floods aur Climate Change ka rishta ek badi warning hai. Ye sirf kudrat ka gussa nahi, balki manav dwara ki gayi galtiyon ka natija hai. Agar humne sustainable development ko nahi apnaya, toh baadh ki ye samasya aane wale waqt mein aur bhi bhayanak ho jayegi.
Floods & Climate Change: Common Questions
Climate change se dharti ka taapmaan badhta hai, jis se evaporation (vashpikaran) tez hota hai. Garam hawa zyada nami soke rakhti hai, jo achanak bhari baarish ke roop mein barasti hai aur baadh ka karan banti hai.
Hamesha nahi, lekin Global Warming baadh ki teevrata (intensity) aur frequency ko badha deti hai. Ye pehle se maujood natural weather patterns ko zyada khatarnak bana deti hai.
Normal baadh dheere-dheere aati hai, jabki Flash Floods bahut kam samay mein (kuch minutes ya ghanton mein) bhari baarish ya cloudburst ki wajah se aati hain aur sambhalne ka mauka nahi deti.
Himalayan glaciers pighalne se nadiyon mein paani ka star badh raha hai. Isse “Glacial Lake Outburst Floods” (GLOF) ka khatra badh jata hai, jo Uttarakhand aur Himachal jaise rajyon mein tabahi macha sakte hain.
Science ke mutabiq, Mumbai, Chennai, Kolkata aur Kochi jaise coastal shehron par sabse zyada khatra hai. Sea level badhne se in shehron mein baar-baar baadh aane ki sambhavna hai.
Shehron mein concrete ki wajah se paani zameen mein nahi ja pata. Saath hi, purane aur band drainage systems bhari baarish ka paani nikaalne mein nakam rehte hain, jis se roads talab ban jati hain.
Haan, ped mitti ko pakad kar rakhte hain (soil erosion rokte hain) aur paani ke bahav ko dheema karte hain. Afforestation baadh ke asar ko kam karne ka ek natural aur sasta tarika hai.
Monsoon ab “Unpredictable” ho gaya hai. Ab lambe samay tak sookha padta hai aur phir ek saath itni baarish ho jati hai ki baadh aa jaye. Isse kheti (agriculture) ko bhari nuksan hota hai.
Sponge City ek aisa shehar hota hai jise baarish ke paani ko sokhne, filter karne aur store karne ke liye design kiya jata hai, taaki flood ka khatra kam ho aur water table badhe.
Plastic ka use kam karke, zyada se zyada ped lagakar, aur energy bacha kar hum carbon footprint kam kar sakte hain, jo long term mein climate change ki raftar ko dheema karega.
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