煤矿塌陷水域底泥中氮磷分布及其与上覆水体的相关性

N and P Distribution in Sediment and the Correlation with Overilying Water in Coal Mining Collapsed Water Area

为了解潘集杨庄煤矿塌陷水域底泥中氮磷含量的分布特征,以底泥表层(0～2cm)的氮磷含量为数据基础,利用软件ArcGIS 9.2中的克里格插值功能,结合地统计学方法,绘制潘集杨庄塌陷水体底泥中总氮、总磷的空间分布图,并对底泥中氮磷与其上覆水理化性质间均相关性进行分析。结果表明:底泥中总氮的空间分布梯度明显,在土壤养分等级的一级至五级水平之间,而且其分布特征呈现出距离泥河越远,总氮养分越贫乏的趋势;总磷的空间分布位于在土壤养分等级的五级水平,无明显梯度;底泥中总氮、总磷与上覆水中总氮、总磷、水深、氧化还原电位、DO、pH值、温度具有一定的相关性,其中,底泥中总氮与水体中总氮、总磷呈极显著正相关。

The spatial distribution map of total nitrogen and total phosphorus in sediment in Yangzhuang coal mining collapsed water area was formulated by Kriging Interpolation in ArcGIS 9. 2 software and Geostatistical Analyst based on the data of nitrogen and phosphorus content in surface sediment （0-2 cm）and the correlation between N and P distribution in the sediment and physicochemical property of the overilying water was analyzed to study their distribution feature and provide a reference for mamagement. The results showed that the spatial distribution gradient of total nitrogen in the sediment was obvious, five soil nutrient grades were divided and the nitrogen distribution feature presented a gradual declining trend with distance increment away from the sediment The phosphorus spatial distribution had five grades but there was no obvious gradient distribution feature. Total nitrigen and total phosphorus in the sediment had a certain correlation with total nitrogen, total phosphorus, water depth, redox potential, DO, pH and temperature of overlying water,in which, total nitrogen in sediments had a significant positive correlation with total nitrogen and total phosphorus in water.