本文選題：水磨河 + 沿岸土壤　； 參考：《水土保持學(xué)報(bào)》2016年06期

【摘要】：選擇干旱區(qū)典型城市河流烏魯木齊市水磨河為研究區(qū),結(jié)合經(jīng)典統(tǒng)計(jì)學(xué)與地統(tǒng)計(jì)學(xué)相關(guān)方法理論,研究了烏魯木齊市水磨河沿岸土壤重金屬含量的分布特征及其污染評價(jià)。結(jié)果表明:水磨河沿岸土壤重金屬含量在土層深度上差異較小;從土地利用方式來看,人為活動明顯干擾重金屬在沿岸土壤分布中的含量變化,重金屬元素間的相關(guān)關(guān)系在一定程度上反映著幾種重金屬的同源性與差異性;主成分分析表明,Cu和Zn為水磨河沿岸土壤特征重金屬元素,且重金屬因子負(fù)載圖表明Cu和Zn含量存在多因素控制;從空間分布來看,水磨河表層土壤重金屬含量分布高值點(diǎn)位置基本相似,主要在河流南端(上游硫磺溝附近)并與河道遇水庫、遇支流有關(guān),高值點(diǎn)主要集中在青格達(dá)湖、塔橋?yàn)乘畮�、九道灣水庫和硫磺溝附�?水磨河沿岸不同土層重金屬的單因子污染指數(shù)平均值均小于1,整體表現(xiàn)為未污染狀態(tài);內(nèi)梅羅綜合污染指數(shù)分別為1.26(0—20cm),1.20(20—40cm),1.32(40—60cm),介于1.0P≤2.0之間,處于Ⅲ級,為輕度污染;各土層對不同重金屬具有較高的承載力,屬中容量區(qū),水磨河沿岸整體土壤重金屬環(huán)境質(zhì)量良好。綜上可知,Cu和Zn是主要的污染重金屬元素,重金屬污染受到工廠分布、河流改道及水庫建設(shè)等人為活動影響。綜合不同評價(jià)結(jié)果認(rèn)為,目前水磨河沿岸土壤處于未受污染或輕度污染狀態(tài),環(huán)境質(zhì)量良好。
[Abstract]:Based on the theory of classical statistics and geostatistics, the distribution characteristics and pollution evaluation of heavy metal content in the soil of Urumqi, a typical urban river in arid area, were studied in this paper. The results showed that the content of heavy metals in the soil along Shuimo River had little difference in the depth of soil layer, and from the way of land use, anthropogenic activities obviously interfered with the changes of heavy metals in the distribution of soil along the coast. The correlation between heavy metal elements to some extent reflects the homology and difference of several heavy metals, and the principal component analysis shows that Cu and Zn are the characteristic heavy metal elements in the soil along the coast of the Shuimo River. The heavy metal factor load diagram showed that the Cu and Zn contents were controlled by many factors, and the distribution of heavy metals in surface soil of Shuimo River was similar to that of the high value points in the distribution of heavy metals in the surface soil of Shuimo River. It is mainly located at the southern end of the river (near the upstream sulfur ditch) and is related to the river channel and tributaries. The high value points are mainly located near the Qinggeda Lake, the Taqiao Bay Reservoir, the Jiudaowan Reservoir and the Sulphur ditch. The average value of single factor pollution index of heavy metals in different soil layers of Shuimo River is less than 1, and the integrated pollution index of Nemero is 1.26 ~ 20 ~ 20 cm ~ (-1) ~ (40) cm ~ (-1) ~ (32) ~ (40) cm ~ (-1) ~ (60) cm ~ (-1), which is between 1.0 P 鈮，

本文編號：2025723