论文部分内容阅读
开封地区位在黄河南岸由豫西丘陵山地向黄河下游大冲积扇过渡的衔接地段,西部是丘陵山地,东部是冲积平原。本区的高矿化污染潜水是含硝态亚硝态氮在15毫克/升以上的潜水,系埋藏在疏松沉积层中的孔隙潜水,主要分布在东部平原人口集中有机污染源丰富的古老城镇居民点及其附近,在西部丘陵山区,仅散布于山间盆地或黄土丘陵上的古老村镇区。因其含氮量在15毫克/升以上,灌溉农作物有明显的肥效,所以当地群众称这种高矿化污染潜水为肥水,并用来灌溉施肥。由于其含盐量较高,灌溉农田后有导致耕层土壤积盐的危险,因此,对其水质特性及其灌溉后土壤盐量的变化情况进行分析研究和试验观察,很有必要。
Kaifeng region is located in the southern bank of the Yellow River from the hilly area of the western Henan to the lower reaches of the Yellow River large alluvial fan transition section, the western hilly mountains, the eastern alluvial plain. The high-mineralized polluted submersion in this area is a submerged nitrate-containing nitrate at a concentration above 15 mg / L, a pore-submerged system buried in porous sediments that is predominantly distributed in the eastern plains where the concentration of organic pollutants is abundant in ancient urban residents At and near the point, in the western hills and mountains, it is only scattered in ancient towns and villages on mountain basins or loess hills. Because of its nitrogen content of 15 mg / L or more, irrigation crops have obvious effect, so the local people said the mineralization of this high pollution dive into fertilizer, and used for irrigation and fertilization. Because of its high salinity, irrigation of farmland leads to the danger of soil salt accumulation in topsoil. Therefore, it is necessary to analyze and test the changes of water quality characteristics and soil salt content after irrigation.