EAE1022 Lecture Notes - Lecture 20: Gully, Land Degradation, Natural Capital

• School: Monash University
• Department: Science - Atmospheric Science
• Course: EAE1022
• Professor: Marion Anderson

Document Summary

Eae1022 lecture 20 - earth, atmosphere and environment. Key aim of environmental management should be sustainability: No (cid:374)et degradatio(cid:374) of (cid:862)(cid:374)atural (cid:272)apital(cid:863) o(cid:448)er ti(cid:373)e: an assessment of global land degradation, 17% of the 11. 5 billion ha of vegetated land considered degraded. 1 in 6 ha can no longer support crops. Conventional agricultural practices: european practices introduced to a non european landscape, vegetation clearing, changes the hydrology, soil properties, physical and chemical processes of an environment. What is erosion? (cid:862)the ge(cid:374)eral pro(cid:272)ess or the group of pro(cid:272)esses (cid:449)here(cid:271)y the earthy a(cid:374)d ro(cid:272)ky (cid:373)aterials of the. Earth"s (cid:272)rust are loose(cid:374)ed a(cid:374)d (cid:373)o(cid:448)ed fro(cid:373) o(cid:374)e place to another, by natural agencies that i(cid:374)(cid:272)lude (cid:449)eatheri(cid:374)g, solutio(cid:374), (cid:272)orrasio(cid:374) a(cid:374)d tra(cid:374)sportatio(cid:374) (cid:863: erosion is a natural process, geological vs human timescales. Initial impact of agriculture: removal of vegetation and surface cover. Agents of erosion: water, wind, gravity, water erosion can result in, sheet erosion.