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❄️ Cold Tolerance Digital Twin
Real-time cold risk assessment system integrating GPS positioning, meteorological data, and variety-specific cold tolerance models.
Core Model
Cold Risk Index = w₁·T_min + w₂·D_cold + w₃·S_variety + w₄·P_phase| Factor | Meaning | Weight |
|---|---|---|
| T_min | Forecast minimum temperature (°C) | 0.35 |
| D_cold | Continuous cold duration (h) | 0.25 |
| S_variety | Variety cold tolerance score (0−100) | 0.25 |
| P_phase | Phenological sensitivity coefficient | 0.15 |
Variety Cold Tolerance Ratings
| Variety | Score | Category |
|---|---|---|
| Wenye 78F1 | 88 | High tolerance |
| Wenye 4 | 78 | Moderate |
| Wenye 5 | 75 | Moderate |
| Wenye 2/3 | 72 | Moderate |
| Imported varieties | <60 | Sensitive |
Output Levels
- 🟢 Low Risk — No action required
- 🟡 Advisory — Monitor temperature trends
- 🟠 Warning — Prepare protective measures (covering, irrigation)
- 🔴 Severe — Immediate action: smoke, cover, anti-transpirant spray
Coverage
Hainan, Guangdong, Guangxi, Yunnan, Fujian provinces — China's coconut cultivation belt.