Meteorological damage risk assessment and zoning for winter melon and vegetables in Hainan province
Received date: 2014-08-25
Request revised date: 2015-01-04
Online published: 2015-02-10
Copyright
Hainan, an important agricultural zone for winter melon and vegetables in China, suffers from waterlogging, chilling and drought risk that threaten agricultural production. According to the theoretical framework of natural disaster risk system, using daily meteorological observation data of 18 stations from 1998 to 2011, disasters data (from 1998 to 2011), production data (from 1999 to 2011) of melon and vegetables and socioeconomic statistical data (from 2002 to 2011), hazard grade indices, including precipitation and temperature, were constructed . A comprehensive model was built, which integrates with hazard, damage environment sensibility, damage loss and damage prevention capability, to assess disaster damage risk for melon and vegetables. The result showed that waterlogging hazard increased from southwest to northeast, and drought hazard was more serious in east and west than in central Hainan. Chilling hazard for watermelon decreased form central to east and west parts, while it increased from south to north for cowpea and luffa, and increased from southeast to northwest for paprika. Based on disaster hazard spatial pattern, it is implicated that more attention should be paid to those serious hazard regions. Damage environment sensibility of waterlogging rose from central Wuzhishan-Yinggeling-Yajiada mountains to peripherial regions while that of chilling and drought had the contrary pattern. Furthermore, damage loss was similar for melon and vegetables which was high in central Hainan. Damage prevention capability for melon and vegetables differed in different regions especially for high value regions, and its lower value was mainly observed in central regions. The zoning of comprehensive damage risk was similar for watermelon, cowpea and paprika which was higher in eastern Hainan. Comprehensive damage risk for luffa was higher in the northern part while lower in the southeastern. Overall, the disaster hazard index was appropriate in the analysis, and the above zoning matched well with the actual disaster situation in Hainan. The results can provide useful information and expand the understanding of disaster risk for melon and vegetables and helpful to the decision making for agro-meteorological disaster risk management.
Key words: melon and vegetables; waterlogging; chilling; drought; damage risk; Hainan
ZHANG Lei , HUO Zhiguo , HUANG Dapeng , JIANG Yan , XIAO Jingjing . Meteorological damage risk assessment and zoning for winter melon and vegetables in Hainan province[J]. GEOGRAPHICAL RESEARCH, 2015 , 34(2) : 293 -305 . DOI: 10.11821/dlyj201502009
Fig. 1 Annual accumulated chilling in Haikou city for watermelon (a) and paprika (b)图1 海口市西瓜(a)和辣椒(b)有害积寒 |
Tab. 1 Contribution rate of the first two principal components for waterlogging and drought at each station表1 各站点苗期湿涝、春季干旱前两主成分贡献率 |
| 站点 | 苗期湿涝 | 春季干旱 |
|---|---|---|
| 海口 | 90.46 | 89.91 |
| 东方 | 88.26 | 85.50 |
| 儋县 | 94.48 | 88.39 |
| 琼中 | 94.58 | 85.60 |
| 琼海 | 95.11 | 89.71 |
| 三亚 | 88.24 | 89.88 |
| 陵水 | 94.57 | 94.08 |
| 定安 | 93.31 | 85.83 |
| 临高 | 92.03 | 85.72 |
| 澄迈 | 91.79 | 87.90 |
| 昌江 | 89.25 | 85.95 |
| 文昌 | 93.10 | 94.73 |
| 万宁 | 96.38 | 90.23 |
| 屯昌 | 96.72 | 90.44 |
| 白沙 | 96.09 | 87.72 |
| 乐东 | 92.48 | 90.38 |
| 保亭 | 91.80 | 92.92 |
| 通什 | 88.78 | 95.09 |
Tab. 2 Hazards level index for melon and vegetables表2 瓜菜苗期湿涝、冬季寒害、春季干旱致灾等级指标 |
| 灾害 | 瓜菜 | 灾害等级 | 等级指标 |
|---|---|---|---|
| 苗期湿涝 | 西瓜、豇豆、辣椒、丝瓜 | 轻 | [0.5,1.3) |
| 中 | [1.3,1.8) | ||
| 重 | ≥1.8 | ||
| 冬季寒害 | 西瓜 | 轻 | [0.2,1) |
| 中 | [1,2) | ||
| 重 | ≥2 | ||
| 辣椒 | 轻 | [1,5) | |
| 中 | [5,10) | ||
| 重 | ≥10 | ||
| 豇豆、丝瓜 | 轻 | [5,25) | |
| 中 | [25,50) | ||
| 重 | ≥50 | ||
| 春季干旱 | 西瓜、豇豆、辣椒、丝瓜 | 轻 | [-0.15,0.5) |
| 中 | [-0.70,-0.15) | ||
| 重 | <-0.70 |
Fig. 2 The zoning of damage risk for melon and vegetables in Hainan province图2 海南省瓜菜苗期湿涝、冬季寒害、春季干旱危险性 |
Fig. 3 The zoning of damage environment sensibility for melon and vegetables in Hainan province图3 海南省瓜菜苗期湿涝、冬季寒害、春季干旱孕灾环境敏感性 |
Fig. 4 The zoning of damage loss for melon and vegetables in Hainan province图4 海南省瓜菜灾损综合指数 |
Tab. 3 Comprehensive weight of prevention capability for melon and vegetables表3 瓜菜防灾能力各因子综合权重 |
| 因子 | 西瓜 | 豇豆 | 辣椒 | 丝瓜 |
|---|---|---|---|---|
| 产量/面积的变异系数 | 0.366 | 0.406 | 0.449 | 0.440 |
| 趋势产量拟合线的趋势系数 | 0.348 | 0.274 | 0.287 | 0.311 |
| 产量占总的瓜菜产量的比值 | 0.114 | 0.142 | 0.109 | 0.105 |
| 农民人均总收入 | 0.087 | 0.090 | 0.078 | 0.073 |
| 农业机械总动力 | 0.085 | 0.088 | 0.076 | 0.071 |
Fig. 5 The zoning of prevention capability for melon and vegetables in Hainan province图5 海南省瓜菜防灾能力指数 |
Tab. 4 Comprehensive weight of damage factors for melon and vegetables表4 瓜菜气象灾害综合风险各因子综合权重 |
| 瓜菜 | 评估指标 | 综合权重 | ||
|---|---|---|---|---|
| 危险性和孕灾 环境指数 | 湿涝 | 0.703 | 0.528 | |
| 寒害 | 0.115 | |||
| 西瓜 | 干旱 | 0.182 | ||
| 灾损指数 | 0.392 | |||
| 防灾能力指数 | 0.079 | |||
| 危险性和孕灾 环境指数 | 湿涝 | 0.648 | 0.630 | |
| 寒害 | 0.122 | |||
| 豇豆 | 干旱 | 0.230 | ||
| 灾损指数 | 0.294 | |||
| 防灾能力指数 | 0.076 | |||
| 危险性和孕灾 环境指数 | 湿涝 | 0.733 | 0.585 | |
| 寒害 | 0.083 | |||
| 辣椒 | 干旱 | 0.193 | ||
| 灾损指数 | 0.321 | |||
| 防灾能力指数 | 0.094 | |||
| 危险性和孕灾 环境指数 | 湿涝 | 0.124 | 0.632 | |
| 寒害 | 0.517 | |||
| 丝瓜 | 干旱 | 0.358 | ||
| 灾损指数 | 0.305 | |||
| 防灾能力指数 | 0.063 | |||
Fig. 6 The zoning of comprehensive damage risk for melon and vegetables in Hainan province图6 海南省瓜菜气象灾害综合风险区划 |
The authors have declared that no competing interests exist.
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