本文選題：土壤質(zhì)地 + van�。� 參考：《長江流域資源與環(huán)境》2016年08期

【摘要】：頻繁干濕交替增強(qiáng)了鄱陽湖洲灘土壤水對濕地系統(tǒng)的動態(tài)調(diào)節(jié)作用。以鄱陽湖吳城國家自然保護(hù)區(qū)的一個典型洲灘濕地為研究區(qū),調(diào)查分析了土壤質(zhì)地沿高程梯度的分布特征,確定了不同土壤質(zhì)地的水分特征參數(shù),并闡述了土壤質(zhì)地與其水分特征參數(shù)的空間異質(zhì)性。結(jié)果發(fā)現(xiàn):該洲灘濕地主要分布砂土、粉壤土和粘土三種類型。水平斷面方向上,粒徑較粗的砂土和粉壤土主要分布在高位灘地,而粒徑相對較細(xì)的粘土主要分布在近湖區(qū)開闊水面的低位灘地;土壤剖面方向上,土壤質(zhì)地呈現(xiàn)出固有分層特性。van Genuchten模型應(yīng)用于鄱陽湖洲灘濕地土壤水分特征曲線擬合,證實(shí)了該模型在鄱陽湖洲灘濕地的適用性。模型結(jié)果表明土壤殘余含水率θr變化約9%~19%,飽和含水率θs變化約42%~57%,土壤進(jìn)氣值的倒數(shù)α約0.01 cm~( 1),水分特征曲線形狀參數(shù)n介于1.11~4.65之間。土壤含水率變化對van Genuchten模型中參數(shù)α和n較為敏感,而對θr和θs的敏感性相對較弱。研究成果可為后續(xù)該區(qū)域以及全湖區(qū)濕地生態(tài)水文模型的構(gòu)建和發(fā)展提供背景信息和參數(shù)資料。
[Abstract]:Frequent dry and wet alternation enhanced the dynamic regulation effect of soil water on wetland system in Poyang Lake. Taking a typical beach wetland in Wucheng National Nature Reserve of Poyang Lake as the research area, the distribution characteristics of soil texture along the elevation gradient were investigated and analyzed, and the water characteristic parameters of different soil textures were determined. The spatial heterogeneity of soil texture and its water characteristic parameters was also discussed. The results show that there are three types of sandy soil silty loam and clay in the wetland. In the horizontal section direction, the coarse sand and silty loam are mainly distributed in the highstand beach, while the relatively fine clay is mainly distributed in the low beach near the open water surface of the lake area, and in the soil profile direction, The soil texture showed inherent stratification. Van Genuchten model was applied to fitting the soil moisture characteristic curve of Poyang Lake beach wetland, which confirmed the applicability of the model in Poyang Lake beach wetland. The model results showed that the residual water content 胃 _ r was about 9 / 19, the saturated water content 胃 _ s was about 42 / 57, the reciprocal 偽 of the soil air intake value was about 0.01 cm ~ (-1), and the shape parameter of the water characteristic curve was between 1.114.65 and 1.114.65. The variation of soil moisture content was sensitive to the parameters 偽 and n in van Genuchten model, but the sensitivity to 胃 r and 胃 s was relatively weak. The research results can provide background information and parameter data for the construction and development of eco-hydrological model of wetland in this region and the whole lake area.
【作者單位】： 中國科學(xué)院南京地理與湖泊研究所流域地理學(xué)重點(diǎn)實(shí)驗(yàn)室;河海大學(xué)水文水資源與水利工程科學(xué)國家重點(diǎn)實(shí)驗(yàn)室;華北水利水電大學(xué);江西師范大學(xué)鄱陽湖濕地與流域研究教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家重點(diǎn)基礎(chǔ)研究發(fā)展計劃(2012CB417003) 國家自然科學(xué)基金項目(41401031) 河海大學(xué)水文水資源與水利工程科學(xué)國家重點(diǎn)實(shí)驗(yàn)室開放研究基金(2014491611) 江西省重大生態(tài)安全問題監(jiān)控協(xié)同創(chuàng)新中心項目(JXS-EW-00)~~
【分類號】：S151.9

【相似文獻(xiàn)】

相關(guān)期刊論文 前2條

1 段光磊,彭嚴(yán)波,肖華;三峽庫尾上游河段河床邊界組成[J];人民長江;2000年09期

2 ;[J];;年期

相關(guān)博士學(xué)位論文 前1條

1 蔡曉斌;主被動遙感輔助下的鄱陽湖水位時空動態(tài)及洲灘變化研究[D];武漢大學(xué);2010年

，

本文編號：2000775