The Influence Of Irrigation With Water From Yellow River On The Hydro Chemical Characteristics

The city Liaocheng of Shandong province, which is an important grain productionbase in China, is located in the lower reaches of the Yellow River, the hinterland of thecentral plain. This thesis will systematically have a research on the topography,geomorphology, climate, soil, land use type, rivers and hydrogeology condition ofLiaocheng. This paper uses hydrochemistry three-line diagram of Piper analysis methodto reveal hydrochemistry type of groundwater in the area of the irrigation with waterfrom Yellow River, and applies statistical methods and GIS Spatial Technology to havean analysis of EC, pH, DO, NO3-and eight ions in the area of the irrigation with waterfrom Yellow River and here are the results:(1) Research shows that electrical conductivity (EC) and dissolved oxygen (DO) havean obvious space difference in the area of irrigation with water from Yellow River, PHvariation of groundwater in the shallow area is comparatively small and its variationrange is from7.14to7.55, the average value7.34, which shows slightly alkaline, andthe average value of EC is1078.07μS. cm-1, its variation range is from405μS. cm-1to3060μS. cm-1, the variation range of DO is from4.3to36.4, average value17.14. Thispaper has made spatial distribution maps of EC, pH and DO in the area of irrigationwith water from Yellow River through applying GIS Spatial Analysis Technology andby comparing and analyzing all the data in every area, we have found that EC contentnear Yellow River area is relatively small while the content of DO is comparativelylarge, which is caused by the supply of Yellow River to the groundwater.(2) This paper made NO3-spatial distribution maps through GIS Spatial AnalysisTechnology and the result shows that the content of NO3-in the area of irrigation withwater from the mountain is relatively large, and in general, the shallower the burial is,the smaller the content will be, and human activity is closely related to the content ofNO3-in the groundwater. If the contaminated water was discharged without processingand the water for commercial and industrial production use do not reach standard, theywould both potentially influence the NO3-content in the groundwater, and the shallowerarea it is, the more easily the groundwater will be contaminated.(3) The variation range of the main yang and yin ion concentration in the area ofirrigation with water from Yellow River is: Ca2+（13.3-226.7mg/L）、 Mg2+ （30.6-155.1mg/L）、 Na+（29.14-354.1mg/L）、 K+（0.691-15.46mg/L）、 Cl-（116-401mg/L）、HCO3-（326.35-957.7mg/L）、SO42-（8.198-390.6mg/L）. The iondensity of Ca2+、Na+、Cl-、SO42-in the area of irrigation with water from the mountainis relatively high and Mg2+density in Penglou irrigation area is relatively high, and K+density in Guokou irrigation area is relatively high, the content of HCO3-in Wei River isrelatively high, what caused the ion concentration to vary in these areas is mainly for thereason of human activities.(4) Through three-line diagram of Piper analysis method, this paper has found thathydrochemistry type of groundwater will be different in different shallow area ofgroundwater, the average ion concentration of all yin ions in the researching area is Na+（131.6mg/l）＞Ca2+（71.9mg/l）＞Mg2+(67.1mg/l)＞K+(2.54mg/l) and the averageconcentration of all yin ions is HCO3-（542.2mg/l）＞Cl-（229.9mg/l）＞SO42-（139.5mg/l）＞NO3-（44.38mg/l）. In Yellow River there are mainly such ions as Ca2+、Mg2+,whose hydrochemistry type is (Ca-HCO3) and the groundwater in the shallow area isinfluenced by the irrigation with water from Yellow River, where there is a certainnumber of hydrochemistry types distribution in this area from the representativehydrochemistry type of brine （Na-Cl）to representative hydrochemistry type of freshwater （Na-HCO3）.