REHABILITATION: REHABILITATION: A QUICK GUIDE A ... - saobc
REHABILITATION: REHABILITATION: A QUICK GUIDE A ... - saobc REHABILITATION: REHABILITATION: A QUICK GUIDE A ... - saobc
Veld restoration using hollows can be greatly advanced by seeding and mulching each hollow. Grass seed is most effective, but local pioneer annual and perennial shrubs can also be sown. Care must, however, be taken to try and establish plants that are suitably adapted to the harsh environmental conditions in the degraded rehabilitation area. This aspect is dealt with further in this report. A little animal manure added to each hollow will help to improve soil quality and mulching with any available organic plant material or finely chopped brush will help to protect germinating seedlings and keep the soil moist. THE USE OF MULCHED “FENCES”: On sites where there is a slight slope and where accelerated runoff can be expected, the construction of mulched fences is recommended in conjunction with the described hollows. These low “fences” are made across the flow of water and are spaced approximately 3 – 5 m apart. Each “fence” consists of a line of short pegs with an upper wire (at about 250 – 300 mm) and a bottom wire, both connected to the line of pegs. (See Figure 5D). Wire netting is then fixed to the wires to create a fixed “barrier” with an apron strip flat on the ground which must be firmly “stapled” to the ground. The “fence” is then lined with jute geotextile, folded double, and the apron section densely packed with branch mulch. This barrier will slow down water flow and hold back silt, droppings and other organic material, including seeds. Water will flow through he “fence” but at a much slower and less destructive rate, permitting a great deal more infiltration into the soil. Alternatively, shadecloth or biddum plastic geotextile can be used. Woven jute geotextile, however, is more suitable as it is designed specifically for soil erosion control. The mulched apron strip must be seeded before mulching commences. (See next section for details about a suitable grass seed mixture, sowing rate and timing). 11
FIGURE 5A 12
- Page 1 and 2: Telephone: 044 272 2210 Fax: 044 27
- Page 3 and 4: CONTENTS 1. THE PRINCIPLES AND OBJE
- Page 5 and 6: 2. REHABILITATION METHODS The follo
- Page 7 and 8: FIGURE 3A 4
- Page 9 and 10: FIGURE 3B 6
- Page 11 and 12: The suggested method for establishi
- Page 13: Figure 5A illustrates the construct
- Page 17 and 18: FIGURE 5D 14
- Page 19 and 20: 2.5 GULLEY AND RILL EROSION In seve
- Page 21 and 22: FIGURE 6A: Shaping the eroded gulle
- Page 23 and 24: 2.5.4 STEP 4 - SEEDING: Seeding: Se
- Page 25 and 26: only be collected along roads, wher
- Page 27 and 28: FIGURE 6G 24
- Page 29 and 30: 2.7 PLANT ESTABLISHMENT The establi
- Page 31 and 32: This monitoring technique is simple
- Page 33 and 34: FIGURE 8B 30
- Page 35: RAINFALL RECORD FORM Station……
FIGURE 5A<br />
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