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Shallow Groundwater System in Sanjiang Plain

The basic characteristics of the evaluation factors determine the selection of the following categories: solids,[link widoczny dla zalogowanych], total hardness, F, As, Pb, SO, NH. An N, under the Water samples by 8 to calculate the test results and evaluation,[link widoczny dla zalogowanych], water quality analysis results in Table 3. Table 3 The results of water quality analysis unit: mg / L total hardness measurement point solid FAsPbSO {2'NH3 a Nl74644'9 .826.07 OO70b282.690.27X21371695.161.790 【Jo63179.90.37X331.021523.161.57o01065. 2024Xd17231144.983.130.031 (J666.4o.06) (1165807.480.50o.024o031248.10.35X6689429.303.560 () 170.20.05X1013625522.170o7150021R18641284.483120o.0158523039 using formula (4) ~ ( 5) The calculation of the measured sample data to calculate the measured sample index and evaluation, the results shown in Table 4. controlled evaluation of the results of two evaluation methods, in addition to measuring point X., X, slightly different, the other six test consistent results of the evaluation points for X, X, the two measurement points, the gray evaluation Ⅱ and Ⅲ, and the comprehensive index evaluation Ⅲ and Ⅳ. on the measuring point X,[link widoczny dla zalogowanych], the seven evaluation factors a factor of 5 or above in grade Ⅲ, Ⅱ grade gray judge therefore should be miscarriage of justice, law ruled that a more reasonable grade Ⅲ; and measuring point X, 7 reviews factors in a 4 class Ⅳ above, evaluation of this Law Iv a more reasonable level. 3 Results and discussion (continued from page 19) the world in the late former mountain bedrock groundwater system is also known as the shallow groundwater system Tertiary basin. to the late Pleistocene, shallow groundwater and the lake has always been linked close, the system boundary changes with the changes in the lake. Late Pleistocene to modern, as crustal uplift, Xingkai retreat, river system, the role of shallow groundwater to rise to dominance of the boundaries of the system begin to stabilize. 4.2 4.2.1 The impact of human factors the boundary conditions of the shallow groundwater system of the city a lot of exploitation of groundwater, local changes in the boundaries of the system. For example: Jiamusi City because of massive exploitation of underground water, the formation of regional groundwater depression cone, so that the original Songhua groundwater discharge Jiang became recharge groundwater, changing the nature of the border. In addition,[link widoczny dla zalogowanych], as the opening of deep groundwater and comparative evaluation results in Table 4 1) In this paper, to establish a comprehensive index of shallow groundwater environment evaluation model, evaluation results show that is accurate and reliable. 2) evaluation model index compared with the existing evaluation model, the method is simple to use, intuitive evaluation of the results, accuracy is higher. With high utilization of the advantages of information,[link widoczny dla zalogowanych], can more fully reflect the extent of groundwater contamination, it is a practical and accurate methods of evaluation, should be widely applied. 3) The evaluation showed that the eight monitoring sites, there are four genera Ⅲ (light pollution level) 4 is Iv (moderate pollution level). The results of water quality can be seen, most of the sampling points in the salinity, total hardness, total alkalinity and SO were measured indicators such as Iv-level standard value close to some of them out. Reflects the shallow groundwater in this area has been subject to different degrees of pollution, the vulnerability of the water environment is fairly obvious, and the local section of polluting groundwater.