BACKGROUND About an eighth of the earth's land surface is in protected areas (hereafter "PAs"), most created during the 20(th) century. Natural landscapes are critical for species persistence and PAs can play a major role in conservation and in climate policy. Such contributions may be harder than expected to implement if new PAs are constrained to the same kinds of locations that PAs currently...

There are about 270,000 gullies over 500 meters in length on the Loess Plateau, and average soil water content is nearly three times that of slope surface Plateau. In crisscrossed there very rich reserve resources cultivated land potential for increasing grain production. How to manage channel ecologically make full use a problem needs be paid attention to. This study puts forward five factors ...

In engineering blasting, the slope surfaces in blasting area exert various effects on blast vibration velocity. For example, effect and whipping are generated area, which will influence The is key protection for many projects; therefore, it of practical value to explore surface speed prediction against it. velocity was analyzed by numerical simulation fitting. field monitoring data were fitted ...