本文選題：圓盤入滲儀 + 土壤導水特性��； 參考：《水土保持學報》2017年04期

【摘要】：為探究不同入滲水水質(zhì)對土壤導水特性的影響,采用圓盤負壓入滲法進行試驗研究,選取兩種水質(zhì)(蒸餾水和自來水)對黃壤和紅壤進行4個壓力水頭(0,-3,-6,-9cm)下的圓盤入滲試驗。結(jié)果表明,隨著入滲水電導率的增大,土壤入滲率、吸滲率及導水率均隨之增大,且紅壤在不同電導率的入滲水作用下土壤吸滲率的變化差異顯著(P0.05)。在低水頭壓力下,兩種水質(zhì)入滲條件下測得的土壤導水率差異顯著(P0.05);在高水頭壓力下,兩種水質(zhì)入滲下測得土壤導水率差異不顯著,表明入滲水水質(zhì)對土壤導水率的影響主要發(fā)生在低壓力水頭下即在細孔隙下的導水特性上。兩種土壤的大孔隙與中等孔隙對水流貢獻率隨入滲水電導率的增大而增大,而小孔隙對水流貢獻率隨入滲水電導率的增大而減小,入滲水水質(zhì)對紅壤土不同級別孔隙水流貢獻率的影響顯著(P0.05)。研究分析相關(guān)參數(shù)的變化有利于探討野外試驗時入滲水水質(zhì)對試驗結(jié)果的影響,對于正確認識農(nóng)田水文過程、開發(fā)利用劣質(zhì)水資源、提高農(nóng)業(yè)灌溉灌水質(zhì)量和灌水效率等具有重要意義。
[Abstract]:In order to investigate the effect of different infiltration water quality on soil water conductivity, the disc infiltration experiment was carried out by using disc negative pressure infiltration method. Two kinds of water quality (distilled water and tap water) were selected to carry out the disc infiltration experiments on yellow soil and red soil under four pressure water head 0 ~ (-3) ~ (-3) ~ (-6) ~ (-1) ~ (-9) cm). The results showed that the infiltration rate, permeability rate and water conductivity of red soil increased with the increase of infiltration conductivity, and the difference of infiltration rate of red soil under different conductivity was significant (P 0.05). Under low water head pressure, the difference of soil water conductivity between two kinds of water quality infiltration conditions is significant than that under high water head pressure, but there is no significant difference in soil water conductivity under high water head pressure. The results showed that the effect of infiltration water quality on soil water conductivity mainly occurred under the low pressure water head, that is, the water conductivity under fine pores. The contribution rate of macropores and medium pores to water flow increases with the increase of permeation conductivity, while the contribution rate of small pores to water flow decreases with the increase of permeation conductivity. The effect of infiltration water quality on the contribution rate of pore flow in red loam soil is significant (P 0.05). The study and analysis of the change of relative parameters is beneficial to the discussion of the influence of infiltration water quality on the test results during field tests, and to the correct understanding of farmland hydrological process and the exploitation and utilization of inferior water resources. It is of great significance to improve the irrigation quality and irrigation efficiency of agricultural irrigation.
【作者單位】： 河海大學南方地區(qū)高效灌排與農(nóng)業(yè)水土環(huán)境教育部重點實驗室;河海大學水利水電學院;溧陽市國土資源局;江蘇省江寧區(qū)水利局;
【基金】：國家自然科學基金項目(41471180) 江蘇省國土資源科技項目(KJXM2016009) 江蘇省水利科技項目(2016053)
【分類號】：S152.72

【相似文獻】

相關(guān)期刊論文 前10條

1 白丹,李占斌;應用遺傳算法擬合渾水入滲經(jīng)驗公式[J];農(nóng)業(yè)工程學報;2003年03期

2 張娟娟,劉恩民,鄭麗萍;土壤經(jīng)驗入滲指數(shù)的移動窗口統(tǒng)計特性[J];地下水;2004年03期

3 吳軍虎,費良軍,李懷恩;灌施條件下波涌灌溉土壤間歇入滲硝態(tài)氮運移特性試驗研究[J];灌溉排水學報;2004年05期

4 張雅楠;黃興法;毛麗麗;劉汗;;土壤入滲性能自動測量系統(tǒng)原理與應用研究[J];農(nóng)業(yè)工程學報;2007年04期

5 張建豐;王文焰;賈中華;;具有砂質(zhì)夾層的土壤連續(xù)函數(shù)入滲模型[J];水土保持學報;2007年04期

6 盧修元;魏新平;邱s，

本文編號：1797175