Table 2 Total volume released on roads surveyed, total volume that need maintenance and total agriculture land lost surface amounts along 42 % and 100 % of the watershed roads network
From: Rural earthen roads impact assessment in Phewa watershed, Western region, Nepal
Inventory of soil volume losses on roads surveyed | Erosion events | Damaged areas | |||
|---|---|---|---|---|---|
Road | Agriculture land | ||||
Erosion events number | Volume release (m3) | Volume to remove or repair (m3) | Surface buried or destroyed (m2) | ||
TOTAL | Along 42 % of the roads network | 179 | 70133 | 19671 | 37567 |
Along 100 % of the roads network | 426 | 166982 | 46835 | 89445 | |
Event type (42 % of the roads network) | Shallow soil slip | 150 | 22469 | 18576 | 20457 |
Gully | 16 | 8817 | 356 | 0 | |
Extended shallow planar soil slide | 13 | 38847 | 740 | 17110 | |
Event activity (42 % of the roads network) | Recent (<2 years) | 72 | 25580 | 9998 | 22,202 |
Medium (>2 to < 5 years) | 78 | 37178 | 5767 | 15,320 | |
Old (>5 years) | 29 | 7375 | 3907 | 45 | |