發(fā)布時(shí)間：2018-04-24 15:17

  本文選題：圓盤入滲儀 + 土壤導(dǎo)水特性��； 參考：《水土保持學(xué)報(bào)》2017年04期

【摘要】：為探究不同入滲水水質(zhì)對(duì)土壤導(dǎo)水特性的影響,采用圓盤負(fù)壓入滲法進(jìn)行試驗(yàn)研究,選取兩種水質(zhì)(蒸餾水和自來(lái)水)對(duì)黃壤和紅壤進(jìn)行4個(gè)壓力水頭(0,-3,-6,-9cm)下的圓盤入滲試驗(yàn)。結(jié)果表明,隨著入滲水電導(dǎo)率的增大,土壤入滲率、吸滲率及導(dǎo)水率均隨之增大,且紅壤在不同電導(dǎo)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(cè)得的土壤導(dǎo)水率差異顯著(P0.05);在高水頭壓力下,兩種水質(zhì)入滲下測(cè)得土壤導(dǎo)水率差異不顯著,表明入滲水水質(zhì)對(duì)土壤導(dǎo)水率的影響主要發(fā)生在低壓力水頭下即在細(xì)孔隙下的導(dǎo)水特性上。兩種土壤的大孔隙與中等孔隙對(duì)水流貢獻(xiàn)率隨入滲水電導(dǎo)率的增大而增大,而小孔隙對(duì)水流貢獻(xiàn)率隨入滲水電導(dǎo)率的增大而減小,入滲水水質(zhì)對(duì)紅壤土不同級(jí)別孔隙水流貢獻(xiàn)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(yàn)時(shí)入滲水水質(zhì)對(duì)試驗(yàn)結(jié)果的影響,對(duì)于正確認(rèn)識(shí)農(nóng)田水文過(guò)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(xué)南方地區(qū)高效灌排與農(nóng)業(yè)水土環(huán)境教育部重點(diǎn)實(shí)驗(yàn)室;河海大學(xué)水利水電學(xué)院;溧陽(yáng)市國(guó)土資源局;江蘇省江寧區(qū)水利局;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41471180) 江蘇省國(guó)土資源科技項(xiàng)目(KJXM2016009) 江蘇省水利科技項(xiàng)目(2016053)
【分類號(hào)】：S152.72

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