本文關(guān)鍵詞：曹娥江流域水利工程對生態(tài)環(huán)境影響的研究，由筆耕文化傳播整理發(fā)布。

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中國文學(xué)

地球物理學(xué)

曹娥

     AN APPLICATION RESEARCH OF SCS MODEL BASED ON REMOTE SENSING INFORMATION IN CAO E RIVER BASIN

     SCS遙感水文模型在曹娥江流域應(yīng)用研究

短句來源

     Splendid Inscription of Cao E Stele

     絕妙好辭《曹娥碑》

短句來源

     In this paper,the parameters of the model were modified properly according to the geographical features of Cao E River basin and the re- mote sensing information.

     本文結(jié)合曹娥江流域下墊而情況及遙感信息,對模型參數(shù)作適當(dāng)修正.

短句來源

     In this paper,the parameters of the model were modified properly according to the geographical features of Cao E River basin and the re- mote sensing information.

     本文結(jié)合曹娥江流域下墊面情況及遙感信息,對模型參數(shù)作適當(dāng)修正.

短句來源

     AN APPLICATION RESEARCH OF SCS MODEL BASED ON REMOTE SENSING INFORMATION IN CAO ERIVER BASIN

     SCS遙感水文模型在曹娥江流域應(yīng)用研究

短句來源

     ESTABLISHMENT OF FLOOD ROUTING MODEL OF FLOODPLAIN IN UPPER CAOE RIVER BASIN BASED ON GIS

     GIS支持下的曹娥江上游洪泛區(qū)洪水演進(jìn)模型的建立

短句來源

     Analysis of economic benefits of Cao'ejiang River Lock

     曹娥江大閘經(jīng)濟(jì)效益分析

短句來源

     Study on the Water Environmental Capacity of Advanced Position Branch of Cao-e River

     曹娥江上游支流水環(huán)境容量的研究

短句來源

     Effect of Water Resource Projects along Caoe River Basin on Ecological Environments

     曹娥江流域水利工程對生態(tài)環(huán)境影響的研究

短句來源

更多       

     Splendid Inscription of Cao E Stele

     絕妙好辭《曹娥碑》

短句來源

     Analysis of economic benefits of Cao'ejiang River Lock

     曹娥江大閘經(jīng)濟(jì)效益分析

短句來源

     Note on the Word "Cao"

     釋“曹”

短句來源

     Porcelain Works by Cao Chuensheng

     曹春生陶藝

短句來源

     The diamondbaek moth (Plutella xylostella L.)

     小菜娥(Plutella。xylostella L.)

短句來源

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  cao e

A cao e implementada es de uma hierarquia de cos de trabalho.

As coes desenhadas para o Versus podem especificar a granularidade da cao e a itica de co de conflitos a usar.

Nas esferas esta cao e atingida por certos campos de vetores, os campos de Pedersen.

Para tal e ario que os documentos estejam anotados com essa cao e que existam motores de pesquisa especializados que tirem partido dessa incao.

This article describes a mathematical model of suspended sediment transportation in a tidal river. In addition to the usual unsteady flow differential equations, the following conservative equation of sediment mass, based on the theory of diffusion, is introduced:in which A = cross - sectional area of channel, S = mean suspended sediment concentration in the cross - section ; Q = discharge; B= channel width; H = water depth; d= median size of sediment;ω= fall velocity, k = von Karman universal constant;u = mean...

This article describes a mathematical model of suspended sediment transportation in a tidal river. In addition to the usual unsteady flow differential equations, the following conservative equation of sediment mass, based on the theory of diffusion, is introduced:in which A = cross - sectional area of channel, S = mean suspended sediment concentration in the cross - section ; Q = discharge; B= channel width; H = water depth; d= median size of sediment;ω= fall velocity, k = von Karman universal constant;u = mean velocity in the cross-section) C = Chezy coefficient;ξ = constant, for Qiantang River equals 1/3; ψ = capacity load of the tidal flow. These equations deal with water and sediment separately. In the case of low concentration, it can be served as an approximation.The medium diameter d50 of the sediment, in which about 15% by weight is less than 0.02mm, is 0.02-0. 06mm. According to the analyses made with the vertical concentration profile of suspended sediment measured in fields, laboratory tests as well as the results from the verification of this mathematical model, certain rate of flocculation ard agglomeration of suspended sediment is expected under some conditions. In the case of △H/H中<1, thefollowing criteria are used:ω = 0.00114S0.366m/s, when ω>0.0015m/s;and ω = 0.0015m/s, when ω≤0.0015m/s;where △H = tidal range; H中= water depth below mean tidal level. The formerly deduced formula of suspended sediment transportation formean flood flow or ebb flow during a tidal cycle in the river, is used in this model for computing the instantaneous concentration, where k = 5-7 for straight reaches, but it increases greatly at river bends.The differential equations describing both the tidal flows and suspended sediment transport were solved using characteristic difference scheme with different length step △x. It is stable and convenient for computation.The verification computation was carried out in the Qiantang River from Tantou to Qibao and in its tributary Cao'e River from Sangpendian to Dingjiaba for forty three tidal cycles. The duration curve of the calculated suspended sediment concentration agrees fairly with the measured value on the whole as shown in Figs. 3,4 and 6.

本文采用小含沙量近似,初步建立了適用于錢塘江的潮流榆沙數(shù)學(xué)模型。驗(yàn)證計(jì)算和室內(nèi)試驗(yàn)表明,中徑為0.02～0.06毫米的錢塘江懸沙在沉降過程中會發(fā)生某種程度的絮凝。除涌潮摻混特別強(qiáng)烈的情況外,必須考慮加大沉速才能使計(jì)算的含沙量過程線符合實(shí)測資料(沉速變幅約一倍);還認(rèn)為應(yīng)考慮河灣對河流輸沙能力的影響。在此基礎(chǔ)上,對錢塘江、曹娥江部分河段共43個(gè)潮作了全潮含沙量過程驗(yàn)證計(jì)算,其結(jié)果與實(shí)測值比較接近。計(jì)算中使用了不等步長的特征線偏心差分格式。

:

曹娥江上游地區(qū)，，由于受自然條件和人類活動的影響，導(dǎo)致嚴(yán)重的水土流失，成為浙江省水土流失最為嚴(yán)重的河流。水土流失破壞了生態(tài)平衡，威脅著流域內(nèi)人民的生產(chǎn)和生活安全，極需治理。

This paper deals with four new species of parasitic monogenea from freshwater fishes in China. Measurements are in mm. Type speciments arc deposited in the Department of Biology, Hangzhou University.Ancyrocephalidae Bychowsky, 19371. Ancyrocephalus fujianensis sp. nov. (fig. 1)Host and location: Gill filaments of Leptobotia compressicanda (Nichols).Locality: Jiangou (118°20'E., 27°5'N.) of Province Fujian.This species is similar to A. Mac Ma, Li et Wang, 1981, In the shape of archors, but differs from the latter...

This paper deals with four new species of parasitic monogenea from freshwater fishes in China. Measurements are in mm. Type speciments arc deposited in the Department of Biology, Hangzhou University.Ancyrocephalidae Bychowsky, 19371. Ancyrocephalus fujianensis sp. nov. (fig. 1)Host and location: Gill filaments of Leptobotia compressicanda (Nichols).Locality: Jiangou (118°20'E., 27°5'N.) of Province Fujian.This species is similar to A. Mac Ma, Li et Wang, 1981, In the shape of archors, but differs from the latter in size and shape of the chitinous apparatus, especially the structure and size of copulatory organ are quite different between this two species.2. Ancyrocephalus jiangxinensis sp. nov. (fig. 2)Host and location: Gill filaments of Gnathopogon argentatus (San. et Dab.).Locality: Boyang lake (116°21'E., 29°2'N.) of Province Jiangxie; Cao'e river (120°50'E., 29°36'N.) of Province Zhejiang.The anchors of this species are similar to A. kamegaii Gussev, 1985, but differs from the latter in the size of the chitinous elements and also in the size and shape of copulatory complex.3. Ancyrocephalus boyangensis sp. nov. (fig. 3)Host and location: Gill filaments of Gnathopogon argentatus (San. et Dab.).Locality: Boyangensis lake (116°21'E., 29°2'N.) of Province Jiangxi; Cao'e river (120°50' E., 29°36'N.) of Province Zhejiang.This species resembles A. polymorphus Gussev, 1955 in the shape of haptoral chitinous elements, but differs from the latter in the size of these elements especially in the hooklet and size of copulatory complex.4. Ancyrocephalus qiantangensis sp. nov, (fig. 4)Host and location: Gill filaments of Hemibarbus maculatus Bleeker.Locality: Qiantang river (120°25'E., 30°17'N.) of province Zhejiang.This species is similar to A. pavlovsky Gussev, 1955 in the shape of haptoral chitinous elements, but differs from the latter in the sire of these elements and in the structure and size of the copulatory complex.Key words Monogenea Dactyrogyridea Ancyrocephalidae Ancyrocephalus new species

本文報(bào)道并敘述我國四種寄生于淡水魚上的錨首蟲,它們是:福建錨首蟲、江西錨首蟲、鄱陽錨首蟲和錢塘錨首蟲,分別寄生于鰍、(魚勾)和(魚骨)屬淡水魚的鰓絲上,分布在我國福建建甌、江西鄱陽湖、浙江曹娥江、錢塘江等淡水江湖中。文內(nèi)各新種和相似種列表并描述了在形態(tài)特征上的相互差別,以確定該新種的成立。

  本文關(guān)鍵詞：曹娥江流域水利工程對生態(tài)環(huán)境影響的研究，由筆耕文化傳播整理發(fā)布。