1 Water stored in soils. 2 One of the most important elements involved in pedological processes and plant growth. There are three basic form-: water adhering in thin films by molecular attraction to the surface of soil particles and not available for plants is termed hygroscopic water. b Water forming thicker films and occupying the smaller pore spaces is termed capillary water.

儲藏在土壤中的水分女人18毛片A毛片免费，2）在土壤過程和植物生長中最重要的元素之一国内一级老妇黄色视频，有三種基本形態(tài)-：（s：a 藉分子間引力以薄膜形式附著在土壤顆粒表面的水分日韩图片自拍视频在线播放，不能被植物利用人妖专区综合无码第一页，稱為吸濕性水黄色网站视频免费体验看， b形成厚的水膜填充在較小土壤氣孔中国产91精品一区在线观看，稱為毛細管水。

Zhejiang is a poor-water province with water volume per head no less than a quarter of world average level. Moreover, its limited water was seriously wasted and polluted . With the development of zhejiangs economy and urbanization, water resource will probably become the bottleneck. Therefore, how to coordinate water, economy and society prefectly will be a thorny problem of Zhejiang must confront.

隨著浙江省經(jīng)濟的發(fā)展和城市化進程的加快污污污91禁在线永久免费观看，水資源將成為浙江省未來經(jīng)濟和社會發(fā)展的巨大制約色色色日本色色，采用經(jīng)濟手段協(xié)調(diào)水資源與經(jīng)濟社會和城市的發(fā)展將是浙江省重要的戰(zhàn)略選擇。

Analysis on benefit and loss of soil and water conservation for construction projects, means that according to the request of scientific development view, harmonious society and the person and nature get along harmonious, Studying thoroughly on the benefit and loss of soil and water conservation of construction projects, exploring and establishing appraisal index system of soil and water conservation. Analyzing and appraising the benefit and loss of soil and water conservation for construction projects qualitatively, quotably, comprehensively, systematically and scientifically. It can provide the scientific basis for technical demonstration and administrative examination for soil and water conservation scheme.

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The carrying capacity of water resources and water environment in Yellow River basin is faced with a huge challenge, such as vegetation destruction, water and soil erosion, riverbed run-up, watercourse shrinkage, water shortage, frequency breakage flow, severity pollution, water quality deterioration, trace to the source and sendiment, coast erosion and regradation.

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This paper also analyses the effect of water deficit on water use, yield, fruit quality, crop coefficient, water use efficiency and economical benefit, and achieved the followings:⑴The research of the water deficit treatment and rewater domino effect significantly test that proper water deficit can regulate and control stomal open degree efficiently, reduce the overtranspiration of leaves, stimulate the compensating effects.

更多水效應研究，進一步證實了適度水分虧缺可以有效調(diào)控梨棗樹葉片氣孔開度人人插人人操大肉穴免费毛片，降低葉片過多的蒸騰耗水www.86se.com，并刺激樹體誘發(fā)補償效應，初步揭示了調(diào)虧灌溉提高果樹葉片水平水分利用效率的機理與水分虧缺引起的&干濕交替過程&對氣孔的調(diào)控機理久久三级你懂视频，從果樹生理角度進一步證實了調(diào)虧灌溉的節(jié)水機理色女综合网色。

In order to do research on pipe flow and pump characteristics of polymer flooding and water flooding rod-pumped well in especially high water-cut stage, rheometric test aimed at production stream from polymer flooding and water flooding rod-pumped well in especially high water-cut stage has been made, and the characteristic of production stream in especially high water-cut stage is confirmed as Newtonian fluid. Experiments using different mediums about pipe flow and pump characteristics is made. Frictional resistance and coefficient of friction resistance of annulus fluid between sucker rod and the pipe flow is calculated under different working conditions. Frictional resistance between plunger and pump barrel under different parameters is calculated based on related theory of pump characteristic and the strained analytical model of oil-well pump. Besides, using the theory of slit flow and hydraulic -clamping pressure, the frictional resistance is calculated, and the error between the result and measured value is no more than 13%.

為研究特高含水期水驅及聚驅抽油機井管流特性與泵特性，本文針對特高含水期水驅及聚驅井采出液進行了流變性試驗久久久久综合欧美，確定了特高含水期油井采出液的性質屬牛頓流體欧美日韩国产黄；利用不同介質，進行管流特性與泵特性試驗超碰操乱伦，得到了不同工況下桿亚洲乱伦视频网站、管環(huán)空流的摩擦阻力和摩阻系數(shù)；根據(jù)泵特性相關理論和抽油泵受力分析模型又大又长又深又粗的操逼视频，計算了不同參數(shù)下柱塞與泵筒間的摩擦阻力老熟女毛多一区二区，并利用縫隙流與液壓卡緊力理論對柱塞與泵筒間的摩擦阻力進行了計算，計算結果與實測值誤差在13%以內(nèi)欧美视频射。

In order to clear heterogeneous reservoirs waterflooding performance, and decreased interlayer and within-layer contradictions, and improved the water flooding recovery, experimental study should be conducted first, This paper based on Pucheng Sasan reservoir sandstone cores to study object. Multi-point pressure measurement of water flooding oil experimental apparatus was established. Through the three-layer water flooding experiment to study injection strategy, interlayer interference and recovery factors. True sandstone micro-model water flooding used newly developed color visual image analysis system researched water-drive types, forms of residual oil and waterflood efficiency. Percolation mathematical model was established, black oil simulation program was developed, long-core displacement experimental results were matched, pressure and saturation change were researched by the simulation matching results.

為了明確非均質儲層注水開發(fā)動態(tài)過程国产毛多水多女人A片，減輕由于層間和層內(nèi)非均質造成的開發(fā)矛盾，提高水驅采收率啪啪啪免费视频网站，本文從實驗研究出發(fā)欧美操老女人视频，以濮城沙三儲層巖心為研究對象国产AV高清国片精品，建立了一套帶多測壓點的多層長巖心水驅油實驗裝置，通過開展三層水驅油實驗欧美视屏在线视频，研究注水方式精品国产一区二区三区91在线、層間干擾以及采收率影響因素；真實砂巖微觀模型水驅油實驗采用最新研制的彩色可視化圖像分析系統(tǒng)研究水驅類型国产欧美日韩区一区二、殘余油形成類型以及水驅油效率成年无码动漫AV片在线观看不卡；建立并求解滲流數(shù)學模型，編制黑油模擬程序午夜性一级视频，對長巖心驅替實驗進行擬合国产孕妇一级A片免费观看，通過擬合結果研究驅替過程中油水飽和度和壓力的變化情況等研究工作。

After water attaining a designated standard,some reclaimed water went industry's,some went farmland irrigation,the rest for storage which mainly used in farmland irrigation,forestry,con—servation of water and soil tO reduee it to discharge into the South-to-North Water Diversion Project／or guaranteeing the water quality which was the key research item.

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Under the industrialization and market of water supply enterprise, it uses the tool of SFOT strategy analysis by the development of theory and policy of water supply. It puts up with market competition strategy of Shangrao water supply enterprise by strategetic analysis and matching. That is to say, by market penetration, market development and product development to make water supply enterprise grow densely. it will improve the assistance of the development of water supply by analysis of resources of strategy and combination of market.

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Firstly, virtual water contents were calculated for primary farm products and for virtual water consumption of residents in Jiangxi Province in 2000. The virtual water contents of crops was 284.81×108 m^3, and the virtual water consumption of rural residents 670.17 m^3. Then, based on the predecessors' study results, the difference of virtual water con- sumption of residents between Jiangxi Province and Shanxi Province was analyzed.

首先計算2000年江西省主要農(nóng)產(chǎn)品虛擬水含量和城鄉(xiāng)居民生活消費虛擬水含量，得出糧食作物的虛擬水含量為284.81×108立方公尺久久精品视频这里；城鎮(zhèn)居民人均消費主要產(chǎn)品的虛擬水量為768.27立方公尺免费在线观看欧美；農(nóng)村居民人均消費主要產(chǎn)品的虛擬水含量為670.17立方公尺。