The Earth as Modified by Human ActionMarsh, George P. (George Perkins)
History
The Earth as Modified by Human Action
Marsh, George P. (George Perkins)
Conservation of natural resources; Human geography; Nature -- Effect of human beings on; Physical geography
between 1836 and 1857, which are not reported.--Annuaire des Eaux et
Forets, 1872, p. 9.]
In 1865 the Legislative Assembly passed a bill amendatory of the law of
1860, providing, among other things, for securing the soil in exposed
localities by grading, and by promoting the growth of grass and the
formation of greensward over the surface. This has proved a most
beneficial measure, and its adoption under corresponding conditions in
the United States is most highly to be recommended. The leading features
of the system are:
1. Marking out and securing from pasturage and all other encroachments a
zone along the banks and around the head of ravines.
2. Turfing this zone, which in France accomplishes itself, if not
spontaneously, at least with little aid from art.
3. Consolidation of the scarps of the ravines by grading and wattling
and establishing barriers, sometimes of solid masonry, but generally of
fascines or any other simple materials at hand, across the bed of the
stream.
4. Cutting banquettes or narrow terraces along the scarps, and planting
rows of small deciduous trees and arborescent shrubs upon them,
alternating with belts of grass obtained by turfing with sods or sowing
grass-seeds. Planting the banquettes and slopes with bushes, and sowing
any other vegetables with tenacious roots, is also earnestly
recommended. [Footnote: See a description of similar processes
recommended and adopted by Mengotti, in his Idraulica, vol. ii., chap.
xvii.]
Remedies against Torrents.
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