| Cite this article: | 秦安振.黄淮海平原涝渍分区与排涝标准研究[J].灌溉排水学报,0,():-. |
| qinanzhen.黄淮海平原涝渍分区与排涝标准研究[J].灌溉排水学报,0,():-. |
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| Study on Flooding Areas Classification and Drainage Control in the HuangHuaiHai Plain |
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qinanzhen
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Institute of Farmland Irrigation, CAAS
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| Abstract: |
| 【Objective】HuangHuaiHai Plain is an important grain production base in China. However, crops in this area are often affected by the form of short-term heavy rainfall in summer, which is easy to cause waterlogging disaster in a short time. The objective is to solve the above problems and provide a theoretical basis for the drainage project in the HuangHuaiHai area.【Method】This paper collected the precipitation of the main cities in the area in the past two decades (2000-2018), and selected the maximum rainfall for three consecutive days over the years for runoff analysis of farmland drainage.【Result】Major factors determining the division of flooding areas are: rainstorm size, duration and the number of days without rain before rain. The calculation results of partition parameters are divided into three grades: > 0.78, 0.78-0.45, < 0.45. The first is rainstorm type water-logging area, including Hebei Province and Henan Province, with parameters of 0.78 and 0.87; the second is coastal type water-logging area, including Shandong Province and Anhui Province, with parameters of 0.45 and 0.46; the third is drought type water-logging area, including Shanxi Province, with parameters of 0.41. Water-logging area and yield are related to the maximum continuous three-day rainfall every year. The impact of Water-logging on corn yield varies with the rainfall in different provinces, such as rainstorm type and coastal type.【Conclusion】The flood control standard should be raised from once in 5 years to once in 10-20 years; for vegetables and protected areas, it should be greater than once in 20 years. |
| Key words: HuangHuaiHai Plain; Runoff analysis; Maize yield; Precipitation frequency |
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