西南师范大学学报（自然科学版）
西南師範大學學報（自然科學版）
서남사범대학학보（자연과학판）
JOURNAL OF SOUTHWEST CHINA NORMAL UNIVERSITY
2014年
3期
158-165
,共8页
桂江流域%河流%水化学%岩溶
桂江流域%河流%水化學%巖溶
계강류역%하류%수화학%암용
Guij iang Basin%rivers%water chemistry%karst
于2012-2013年的四季分别在桂江流域采集水样,每次采样分别取15个样品,通过研究发现流域内水化学在不同的时间和空间具有不同的变化特征.研究表明：(1)桂江流域四季 pH 值介于6.32~8.87,平均值为7.61；EC变化在18~379μs/cm之间,平均值为170μs/cm；SIc变化范围为-4.04~0.98,平均值为-0.74；桂江的水化学类型以 HCO3-Ca型为主.(2)Ca2+,Mg2+,HCO-3和SIc在流域的变化特征相似,总体呈现中游高上下游低的特点.由于工农业活动的影响,SO2-4和NO-3在桂江流域上游和中游的部分支流相对较高.Cl-,Na+和K+总体上看中下游较高,是由于大气降水和下游砂页岩的影响而成.(3)桂江流域河水主要离子在冬季含量最高夏季最低,秋季和春季其次,主要是由于夏季降水较多,河流中溶解的主离子被大量雨水稀释,冬季则相反.
于2012-2013年的四季分彆在桂江流域採集水樣,每次採樣分彆取15箇樣品,通過研究髮現流域內水化學在不同的時間和空間具有不同的變化特徵.研究錶明：(1)桂江流域四季 pH 值介于6.32~8.87,平均值為7.61；EC變化在18~379μs/cm之間,平均值為170μs/cm；SIc變化範圍為-4.04~0.98,平均值為-0.74；桂江的水化學類型以 HCO3-Ca型為主.(2)Ca2+,Mg2+,HCO-3和SIc在流域的變化特徵相似,總體呈現中遊高上下遊低的特點.由于工農業活動的影響,SO2-4和NO-3在桂江流域上遊和中遊的部分支流相對較高.Cl-,Na+和K+總體上看中下遊較高,是由于大氣降水和下遊砂頁巖的影響而成.(3)桂江流域河水主要離子在鼕季含量最高夏季最低,鞦季和春季其次,主要是由于夏季降水較多,河流中溶解的主離子被大量雨水稀釋,鼕季則相反.
우2012-2013년적사계분별재계강류역채집수양,매차채양분별취15개양품,통과연구발현류역내수화학재불동적시간화공간구유불동적변화특정.연구표명：(1)계강류역사계 pH 치개우6.32~8.87,평균치위7.61；EC변화재18~379μs/cm지간,평균치위170μs/cm；SIc변화범위위-4.04~0.98,평균치위-0.74；계강적수화학류형이 HCO3-Ca형위주.(2)Ca2+,Mg2+,HCO-3화SIc재류역적변화특정상사,총체정현중유고상하유저적특점.유우공농업활동적영향,SO2-4화NO-3재계강류역상유화중유적부분지류상대교고.Cl-,Na+화K+총체상간중하유교고,시유우대기강수화하유사혈암적영향이성.(3)계강류역하수주요리자재동계함량최고하계최저,추계화춘계기차,주요시유우하계강수교다,하류중용해적주리자피대량우수희석,동계칙상반.
Water samples in Guijiang basin in the four seasons of the years from 2012 to 2013 have been col-lected,and each sampling 1 5 samples have been taken.Through the studies it has been found that the internal chemical changes in different time and space have different characteristics.Studies have shown that 1 )pH val-ues between 6.32-8.87 in Guijiang basin,an average of 7.61;EC change between 18-379μs/cm,an av-erage of 170μs/cm;SIc range of -4.04-0.98,mean of -0.74;the water-chemical type of Guijiang basin is HCO-3-Ca;2)Ca2+,Mg2+,HCO-3 and SIc in the basin changing characteristics are similar,general char-acteristics of high on the middle and lower upstream and downstream,and due to the impact of industrial and agricultural activities,SO2-4 and NO-3 at some tributaries are relatively high in the Guijiang basin of the up-per and middle reaches,and Cl-,Na+ and K+ on the whole middle and lower reaches of a higher,mainly due to atmospheric precipitation and effects of sandstone and shale in the lower;3)highest concentrations of the major ions in the winter,summer is the lowest in the Guijiang basin,followed in spring and in au-tumn,mainly due to higher rainfall in summer,rivers primary ions are dissolved in water diluted and win-ter does the opposite.
