Water and Transformation in Dryland Systems - Resilience Science & Keyline Application.mp4 - Pics
healthy water cycle integration
socio-ecologicla systems - complex adaptive systems incorporating huma societies, economies, ecosystems, and their interactions... recognizing that human communities both depend on natural resources and modify them through their actions, creating mutual feedbacks.
Yeoman's talks about in the early 70s, "city forest", HER, human environment revolution, humans and environment can't be separated, must treat as one system.
Stable state, but maybe not desirable
ball and cup, basin of attraction, attractor, how much energy to move within the basin, how much to move the ball out of the cup, is the cup deep or shallow?,
3-5 variables can have non-linear behavior -buzz halling?,
whirlwind farm, bought in 2006, stable, hard to move land out of this state
resilience science, capacity of a social ecological system to absorb disturbance and sustain its fundamental function structure identity and feedbacks as a result of recovery or reorganization in a new context.
History of the land
alternative stable state
thresholds, critical level of one or more variables that triggers regime shift in a system
desirability of systems, can be stable and not desirable
up to 33 tons topsoil ha/yr lost to wind erosion
Partial rest in drylands, will degrade after many years, needs some grazing, as seen in many other reports i've read, look at the herbivores as a part of the singular system of dryland, evolved together,
keep grazing close, duplicate evolution, close together to avoid predators, then move on after soiling the area,
NRCS ESO report, "if erosion high surface salinity and reduced infiltration restrict grass abundance restoration is probably impossible. " , national resources conservations service part of USDA,
NRCS = " ...interruption of overland water flow, by roads etc, may reduce soil water availability to the point where the plants die and cannot reestablish. These factros - may lead to long term degredation."
rainwater should be shed from landscape as quickly as possible. - modern thought
main focus, water cycle healing, big driver, when this is in place, everything else should fall into place,
water catchment analysis,
system memory, the old seeds, they seeded wheat and rye, but none of it came up, all stored seed-bank waiting dormant for favorable conditions,
ripped down yeoman with about a foot, old people/knowledge,
ph dropped .3 over 1st year
saline reduction 59%, pushed lower than root zone
compaction reduced 50-90%
water infiltration 11x faster
control area, no keyline, <25% growth per plant compared to WW, 8% bare ground remains, no water cycle healing,
2 years later, soil litter, amphibians, ground nesting birds,