Table 1 The villages in different zones of slope and topographic relief in Henan (unit).
Slope/(°) | Number of TVs | Number of RTCVs | Number of CVs | Topographic relief/(m) | Number of TVs | Number of RTCVs | Number of CVs |
|---|---|---|---|---|---|---|---|
0–15 | 925 | 395 | 70 | 0–15 | 825 | 330 | 59 |
15–30 | 86 | 59 | 21 | 15–30 | 168 | 97 | 23 |
30–45 | 8 | 15 | 3 | 30–45 | 21 | 31 | 11 |
45–60 | – | – | – | 45–60 | 3 | 9 | 1 |
60–75 | – | 1 | – | > 60 | 2 | 3 | – |
