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地表土壤水分是判断农田涝害的直接数据源,以欧洲太空局1978~2010年微波遥感土壤水分产品、2013年SMOS MIRAS L3级土壤水分产品和气象站点的月降水数据为基础,结合土壤水分距平指数和土壤水分异常指数,分析2013年东北地区春涝影响范围和严重程度。结果表明:1东北地区以黑龙江省受涝面积最大,约11万km2,约占黑龙江省总面积的1/4;2比较多年的月降水数据与涝灾程度,发现冬春季节强降水是引发春涝的主要原因之一;3春涝的严重程度与高程呈现负相关关系,涝灾区域多集中在高程500 m以下。
Surface soil moisture is the direct data source for judging farmland waterlogging. Based on the data of monthly data of microwave remote sensing soil moisture products of European Space Agency from 1978 to 2010, SMOS MIRAS L3 soil moisture products and meteorological stations in 2013, Flat index and soil moisture anomaly index to analyze the impact scope and severity of spring flood in Northeast China in 2013. The results show that: 1 Northeast China has the largest waterlogging area in Heilongjiang Province, about 110,000 km2, accounting for about 1/4 of the total area of Heilongjiang Province; 2 Comparison of monthly precipitation data and degree of floods over the years shows that heavy rain in spring and winter is the cause of spring One of the main causes of waterlogging; 3 the severity of spring floods and the elevation showed a negative correlation, and the waterlogging areas mostly concentrated below the elevation of 500 m.