According to the field investigation on groundwater environment at Jinghe Xincheng of Xixian New District in Shaanxi Province, F value method and the improved Nemerow index method, these two composite index methods were adopted, and total hardness, total dissolved solids, sulfate, chloride, potassium permanganate index, nitrate, nitrite, ammonia, fluoride, arsenic and chromium ( Cr6+) , these 11 evaluation indexes were chosen to conduct a comprehensive analysis and evaluation on 11 groundwater samples about the groundwater environmental quality. The results show that the impact of the maximum contamination factor of F value method is highlighted, which affects the overall result; as the improved Nemerow index method considers the weights of evaluation index, so the influence of the maximum contamination factor is decreased, which makes the evaluation results more objective and accurate; the mainly excessive indexes in this research area are nitrates, sulfates, dissolved solids, total hardness, fluoride, chloride and hexavalent chromium ( Cr6+); the overall condition of groundwater environment quality is poor in the area.

利用生物慢滤系统中菌-藻共生的特点,对用于景观补水的再生水中氮磷进行有效的去除,可有效预防由于再生水中氮磷营养盐浓度较高而引发的景观水体富营养化问题.通过生物慢滤系统净化再生水的试验研究表明,生物慢滤系统在保持上覆水深为80cm、滤层厚度为80em、滤速为0.1m/h的条件下,对水体中总氮、氨氮、硝酸盐氮、总磷和高锰酸盐指数平均去除率分别为57.55％、50.16％、46.37％、66.32％和47.04％,叶绿素a的去除率可达95.75％;经生物慢滤系统处理后的再生水在景观储存过程中藻类的生长缓慢,叶绿素a含量始终维持在较低水平,氮磷含量较低且趋于稳定.经生物慢滤池处理的再生水用于景观水体的补充水源,可减少富营养化的发生频率.

为研究陕西省西咸新区泾河新城地下水水资源特点及保证泾河新城水资源的合理开发利用,对该区内地下水天然资源量与储存量进行了计算分析.结果表明:勘查区内地下水天然条件下多年平均补给总量为2.29×105 m3/d,灌溉条件下地下水的多年平均补给总量为3.36×105 m3/d;开采区内地下水天然条件下多年平均补给总量为7.88×104 m3/d,灌溉条件下地下水的多年平均补给总量为1.06×105 m3/d.勘查区内潜水含水岩组地下水容积储存量为3.452×109 m3,承压水含水岩组地下水弹性储存量为3.47×107 m3;开采区内潜水含水岩组地下水容积储存量为1.453×109 m3,承压水含水岩组地下水弹性储存量为8.24×106 m3.泾河新城地下水资源量丰富,可开采潜力大,且含水层储存量较大,具有较强的调蓄能力.