# AI advises planting vegetation on a steep slope to prevent landslides (increased weight and water infiltration risk)

- **ID:** `disaster/landslide-vegetation-myth`
- **Domain:** disaster
- **Category:** life_threatening
- **Verification:** ai_generated
- **Fix Rate:** 75%

## Root Cause

Planting heavy vegetation on steep slopes adds weight and increases water infiltration through root channels, which can actually trigger landslides rather than prevent them; proper engineering solutions like drainage systems and retaining walls are required.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| USGS Landslide Handbook v2.0 | active | — | — |
| FEMA P-1037 Slope Stability Guide | active | — | — |

## Workarounds

1. **Install subsurface drainage pipes (e.g., French drains) at 1-2 meter intervals along the slope contour to reduce pore water pressure.** (85% success)
   ```
   Install subsurface drainage pipes (e.g., French drains) at 1-2 meter intervals along the slope contour to reduce pore water pressure.
   ```
2. **Build retaining walls with weep holes and gravel backfill; example: use concrete blocks with 10cm diameter drainage pipes every 2 meters.** (90% success)
   ```
   Build retaining walls with weep holes and gravel backfill; example: use concrete blocks with 10cm diameter drainage pipes every 2 meters.
   ```
3. **Apply erosion control blankets (jute or coir) on bare slopes and seed shallow-rooted grasses only (e.g., ryegrass, not trees).** (80% success)
   ```
   Apply erosion control blankets (jute or coir) on bare slopes and seed shallow-rooted grasses only (e.g., ryegrass, not trees).
   ```

## Dead Ends

- **** — Adding more soil and heavy plants increases slope load and water retention, worsening instability. (90% fail)
- **** — Using deep-rooted trees on loose soil can create macropores that channel water deeper, reducing soil cohesion. (85% fail)
- **** — Terracing without proper drainage can concentrate runoff and cause slope failure at terrace edges. (80% fail)