ENVR 200 Lecture Notes - Lecture 10: Representative Concentration Pathways, Drainage Basin, Water Scarcity

• School: McGill University
• Department: Environment
• Course: ENVR 200
• Professor: Anthony Ricciardi

Document Summary

Annual runoff: is irregular, mostly in tropical regions due to energy budget (hadley cell, ferious cell, atmospheric circulation, current flow, mountains. Himalaya act as a shadow for rain to come into the interior ---create desert. If (cid:455)ou see it glo(cid:271)all(cid:455), it"s (cid:374)ot a pro(cid:271)le(cid:373) u(cid:374)til (cid:455)ou (cid:271)reak it do(cid:449)(cid:374) i(cid:374)to s(cid:373)aller pie(cid:272)es (cid:449)ith diff (cid:272)o(cid:374)ti(cid:374)e(cid:374)tal ----problem in. The ratio of total water to river dischrage. Calculate a global index, assume use all run off and no issue with availability + accessibility. Glo(cid:271)all(cid:455) is (cid:374)ot a pro(cid:271)le(cid:373), (cid:271)ut a (cid:448)er(cid:455) serious pro(cid:271)le(cid:373) (cid:271)(cid:455) the i(cid:374)de(cid:454): serious i(cid:374) (cid:374)orth a(cid:373)eri(cid:272)a, (cid:272)e(cid:374)tral me(cid:454)i(cid:272)o . There are huge global disparities in the availability of water resources, access to drinking water and to adequate sanitation. Stop nutrient flow, system flow, ---physical, chemical--disturb the ecosystem. Normal: 2-6 wk, now: ~9 wk; aral sea: ~ a year (because held up in diff places) We have increase flow somewhere, but decrease flow everywhere.