| Sediment is one of three major environmental factors of water, on the one hand, it can purify water by absorbing pollutants, on the other hand, when the dirt absorption capacity of the dediment itself reaches a certain degree, it will be one of important endogenous polluting source, releasing pollutant to waters. Therefore, it is very important the nutritional status of the sediment for the water quality. Combined two kinds of software the traditional statistics and geographic information system, it can make the nutrients of sediment achieve comprehensive analysis from the qualitative to quantitative, accurately understanding research area nutritional status of every point. Organic matter, available potassium, total phosphorus, and total nitrogen four index are the representative of the sediment nutrients index, which have an important research value. Understanding the space distribution features of sediment, it can provide scientific basis for the water quality improvement and controlling pollution. In this article, the distribution ampling and analysis at PanJi YangZhuang and XieQiao collapse area of the Huainan city, which are the typical representative of the subsided waters, the main conclusions are as the follows:1. The vertical distribution analysis results of the sediment organic matter, available potassium, total phosphorus, total nitrogen of the PanXie collapse area,did not find unified variation rule.2. The organic matter average content of the surrounding soil of the YangZhuang is14.86-21.88g/kg, the average level of the organic matter in the sediment from39.25to48.88g/kg.Therefore, the organic matter'content of the sediment in YangZhuang was obviously higher than surrounding soil's, which is about2times the content. From the coefficient of variation, the variation coefficient of the organic matter of the sediment more higher than the soils'. The average content of the organic matter of the soils and sediment in Xieqiao collapse area respectively scope from31-43,31-41g/kg. The average content is more both the soil and sediment the variation coefficient of the organic matter at about20%floating,the variation degree is not high.3. Both YangZhuang and XieQiao the each layer of available potassium content are more uniform distribution, floating range is not big, content is close, the average of the available potassium content respectively is68mg/kg,80mg/kg. The average of the soil available potassium content in YangZhuang is slightly lower than XieQiao'. Its average of available potassium content respectively is222,120mg/kg. The available potassium content in the sediment of the YangZhuang significantly higher than XiaoQiao'; both mining area the available potassium content in the sediment are higher than the surrounding soil', and the available potassium content in sediment of the YangZhuang is significantly higher than the soil', about three times than soil'.The available potassium variation coefficient of the surrounding soil and the sediment in YangZhuang were less than50%, belong to medium variations.The variation range of available potassium is more slighter in surrounding soil of the XieQiao, belong to medium variation.And its sediment variation degree is higher, explaining its sediment effect by various environment.4. The average of the total phosphorus were0.0215%,0.0334%in the soil of the YangZhuang and XieQiao. We also found that the total phosphorus in the surrounding soil of XieQiao higher than YangZhuang', about1.5times.The average of the total phosphorus is respectively0.0302%,0.0362%in the sediment of the YangZhuang and XiaoXie.According to the average calculation results, the total phosphorus content in sediment of XieQiao slightly higher than YangZhuang'. The total phosphorus content in sediment of YangZhuang is higher than the its surrounding soil, but there is little difference between in sediment of the XieQiao and ins surrounding soil, Its contens are more close.The variation coefficient of total phosphorus in two mining area were between10%-100%,belong to medium variations.5. The average of the sediment total nitrogen content are0.1327and0.1104in YangZhuang and XieQiao collapse area. YangZhuang sediment content are slightly higher than XieQiao'. The Total nitrogen content in the sediment of the YangZhuang is higher than the surrounding soil',about its2times,the nitrogen content in the surrounding soil of the XieQiao is similar with its sediment'.According to the variation coefficient calculation results,the total nitrogen variation in the surrounding soil of the YangZhuang is less than XieQiao surrounding soil'.but,the variation of the sediment is greater than XieQiao sediment'.6. The organic matter content of the each layer is abundang in the sediment of the YangZhuang subsided area, mainly in I level and II level standard, the each layer organic matter content of the sediment of the XieQiao primarily in I level to III level standard. 7. The available potassium content in sediment of the YangZhuang is gradually increased trend from east to west, and the change trend of the three are basic consistent, the westen content are in I level standard,its content is rich.the frist layer and the sedcod layer'content distribution of the available potassium in sediment of the XieQiao are very close, Content range primarily in III level standard,the third and the fourth layer distribution trend are relatively close,the available potassium content scope mainly inⅢ, Ⅳ level standard.8. The first layer and the third layer of the total phosphorus content in sediment of YangZhuang are more uniform, single,its content numerical respectively focused on0.032%and0.02%, the content of the first layer is higher than the third layer'. The content of the second layer has a wider range distribution, its content range from0.0236%to0.0518%,the second and the third layer has a similar range in eastern. Its western content is higher than the first layer and the third layer.The four levels of total phosphorus distribution pattern each are not identiacal in sediment of the XieQiao, but content scope mainly in0.02-0.04%.9. The content of the total nitrogen interpolation distribution in the sediment of the YangZhuang, the east regional of the three levels content rang all within0.2%, the western regional content is higer than the eastern area'.All levels contents range is different,having own features. The total nitrogen content of the first layer,the second layer and the fourth layer in sediment of the XieQiao scope mainly in0.1-0.15%. The distribution pattern of the first layer and the third layer is more complicated.But the second and the fourth layer total nitrogen content distribution pattern is more simpler and clearer.10. Between each nutrition index in sediment of the YangZhuang and the nutrition index of the overlying water correlation analysis results show that:the total phosphorus and available potassium in sediment of the YangZhuang correlation is better,the correlation coefficient is0.671; the total nitrogen and organic matter significantly related in sediment,the correlation coefficient is0.889; The total nitrogen in the overlying water with organic matter, available potassium, total phosphorus, and total nitrogen in sediment are related, and with the organic matter, total nitrogen significant correlation; the total nitrogen in the water with the organic matter, total nitrogen in sediment are very significant correlation. Between each nutrition index in sediment of the XieQiao and the nutrition index of the overlying water correlation analysis results show that:the available potassium and organic matter in sediment are significant correlation, the total nitrogen with organic matter,available potassium, total phosphorus in sediment are related,especially with the total phosphorus are very significant correlation, correlation coefficient is0.827.11. The nutrition elements in sediment of the YangZhuang with its surrounding soil correlation analysis results show that:the total phosphorus in sediment of the YangZhuang with the total nitrogen of the surrounding soil correlation are better, in the0.05level, correlation coefficient is-0.824,the rest of the various nutrition index was not find a good correlagion; The nutrition elements in sediment of the XieQiao with its surrounding soil correlation analysis results show that:the organic matter in the surrounding soil of the XieQiao with the total phosphorus, total nitrogen in the sediment have good correlation, in the0.01level, the organic matter in the soil with the total phosphorus in sediment correlation coefficient are-0.876. in the0.05level, the organic matter in the soil with the total nitrogen in sediment correlation coefficient are-0.733. |
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