R help - Jul 2012 - How to simulate the relationship of vegetation and groundwater in Minqin Oasis, Gansu Province, China

*Dear  **Madam**/**Sir,*

*What would happen if we irrigate the degraded land using the desalinated
saline water in Minqin Oasis, Gansu Province, China? Can we prevent the
disappearing of Minqin Qasis?*

*

                     *

*Background:*

*1.      **The Minqin Oasis is surrounded by two deserts, Badain Jaran
Desert and Tengger Desert. *

*2.      **Water is the root of ecological deterioration of Minqin. On the
hand, severe water scarcity (a, water supply from Hongyashan Reservoir
reduced from 460M tons at 1950s to less than 100M tons now; b, more than 5
billion tons groundwater over extracted totally, the groundwater level
dropped by an average of 10 ~ 12m; c. average annual precipitation for the
past five years is 127.7mm, and the average annual evaporation is 2623mm);
on the other hand, serious deteriorated water quality (about 190,000 tons
salinity carried by irrigated water from Shiyang River).*

*3.      **Traditional theory holds that the restoration of vegetation will
increase the evapotranspiration, then leading to groundwater decline.*

*4.      **Let’s set aside the question of how we desalinated the saline
water. *

*
*

*Thank you!*

*
*

*Sincerely,*

*
*

*YU*


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