本文選題：河北雨洪模型 + 降雨強(qiáng)度�。� 參考：《水文》2016年03期

【摘要】：下滲強(qiáng)度的計(jì)算是干旱半干旱地區(qū)超滲產(chǎn)流計(jì)算的關(guān)鍵環(huán)節(jié)。河北雨洪模型中的流域下滲強(qiáng)度計(jì)算公式由兩部分組成,一部分為由張力引起的下滲強(qiáng)度,另一部分為由重力引起的下滲強(qiáng)度(穩(wěn)定下滲能力)。計(jì)算以上兩部分下滲強(qiáng)度時(shí),公式所用的雨量有重復(fù),致使總下滲強(qiáng)度普遍偏大,從而導(dǎo)致模型模擬的洪水過程的洪量及洪峰偏小。提出一個(gè)改進(jìn)的流域下滲強(qiáng)度計(jì)算公式,計(jì)算張力引起的下滲時(shí)所用雨強(qiáng)為總雨強(qiáng)與穩(wěn)定下滲能力的差值。利用改進(jìn)前后的計(jì)算公式,分別對2mm/h到10mm/h雨強(qiáng)及0mm到140mm表層土濕條件下的下滲強(qiáng)度進(jìn)行計(jì)算,并對結(jié)果進(jìn)行對比分析。大閣流域的實(shí)例應(yīng)用結(jié)果表明,改進(jìn)后的下滲強(qiáng)度計(jì)算公式,對模擬洪水過程的洪量和洪峰流量的增加效果明顯,增加值分別為實(shí)測值的14.14%和10.08%。
[Abstract]:The calculation of the infiltration strength is the key link in the calculation of the hyper production flow in arid and semi-arid areas. The calculation formula of the drainage strength of the basin in the Hebei rainwater model is composed of two parts, one part is the infiltration strength caused by the tension, the other part is the infiltration strength caused by gravity (stable infiltration capacity). The seepage strength of the above two parts is calculated. The amount of rainfall used in the formula is repeated, resulting in the general low infiltration strength, which leads to the small flood and peak of flood process in the model simulation. An improved calculation formula for the drainage strength of the basin is put forward to calculate the difference between the rainfall intensity and the steady infiltration capacity of the total rainfall caused by the tension, and the calculation formula before and after the improvement is used. The infiltration strength of 2mm/h to 10mm/h rain intensity and 0mm to 140mm surface soil wetting conditions are calculated respectively, and the results are compared and analyzed. The application results of the case of the Great Pavilion basin show that the improved calculation formula of infiltration strength is obvious to the increase of flood and peak flow in the simulated flood process, and the added value is 1 of the measured value respectively. 4.14% and 10.08%.

【作者單位】： 中國礦業(yè)大學(xué)資源與地球科學(xué)學(xué)院;河北省水文水資源勘測局;
【分類號】：P333.2

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本文編號：1773711