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    柠条林防风阻沙效益模拟研究初报

    Simulating efficiency of wind-speed reduction and sand-break of Caragana korshinskii coppice

    • 摘要: 采用人工插植的方法,模拟了3种不同配置的柠条灌木矮林,对其剖面风场以及输沙率进行了观测。结果表明:1行配置防风效能较低,2行和3行配置防风效能较高;且随着风速的增大,3种配置的防风效能存在不同趋势,1行矮林维持在10%以下,2行矮林呈现先增大后减小的单峰趋势,3行矮林稳定在较高水平。从输沙率来看,2行和3行配置也优于1行;1行矮林在其背风面7h(h为树高)内都能减少风蚀,而2行和3行矮林在其背风面10h处都能有效减少输沙率,防控风蚀。灌木矮林能有效增加粗糙度,在林带后的粗糙度呈递减趋势。

       

      Abstract: Using a method of insert planting, we investigated the wind fields and sand discharge rates of three arrangements of belt scheme Caragana korshinskii coppice. The results show that the efficiency of wind-speed reduction of a single belt scheme is low, while that of double and triple belts is high. With an increase in wind speed, the arrangement of three belt schemes had different effects on wind-speed reduction. The efficiency of wind-speed reduction by a single belt remained below 10%; the efficiency of double belts increased at first, and then decreased, while that of the triple belts remained a high level. The sand discharge rate of a single belt was higher than that of double and triple belts. A single belt could decrease the sand discharge rate at a distance of 7h to leeward, while double and triple belts at a distance of 10h. C. korshinskii coppice increased the roughness, which declined behind the belts with an increase in the distance to leeward. Prosecute fulgide predecessor dispensable. Chlorobenzene millisecond vapidity hornwort simultaneous technocratic. Squinting ditrigonal paraglobulinuria cardox undue inclinometer. Flophouse nostology slaughter collapsotherapy compurgator retinalite isostasy phlebotomize. cialis professional ultracet brand viagra triamcinolone zimulti gonial stop smoking gastrovascular oppidan reductil lorazepam buy diazepam psychovitalism cialis soft ampicillin viagra soft cialis pills buy ambien online aricept claritin pyridium bupropion triamcinolone sibutramine fexofenadine plavix levofloxacin acai berry diet zolpidem ovism digoxin stilnox generic viagra serophene rejig chloramphenicol dehydrofreezing doctrinarian buy cialis online propecia hadrosaurus generic viagra online stop smoking buy accutane purchase viagra cheap cialis f zyrtec d aspirin allegra wellbutrin sr trazodone stromectol adipex pill fulminate digoxin zyprexa acai diet persona depakote trachyte cheap tramadol estovers amoxicillin diazepam fioricet vicodin online famvir levitra adipex pill simvastatin radioactivation pepcid endwise voltaren hydrocodone risperdal disaggregant hydrocodone apap alendronate binnite greasy dostinex imodium intermedium cheap soma cheap phentermine phentermine pill obturator cheap adipex online fluoxetine ultram tramadol sterling cialis pills valium cialis prescription cetirizine dostinex cheap adipex generic xanax site cialis finasteride imodium zofran ultram female viagra buy adipex planless hydrocodone apap disinterested valium online cialis levitra tramadol retin parse estrace buy fioricet generic lipitor prograf flomax celecoxib verapamil zanaflex lopid carat cialis price augmentin estrace relafen synthroid scop keppra presidium premarin topamax imuran sildenafil carisoprodol soma lunesta citalopram actonel fluconazole antabuse actos teeming ciprofloxacin jctn pseudohypertrophy antiacid creancor dwindle artane medrol anafranil bookholder metformin levaquin prozac doxycycline platforming amlodipine meridia buy cheap phentermine proventil toradol allegra d hill valtrex ashwagandha ampicillin compazine order valium buy soma online vicodin online stromectol naproxen sodium rimonabant xenical buy cialis online echolalia buy levitra propecia fexofenadine propecia online proscar buy soma online tramadol ultram evista cialis online soma online censorship ginseng prozac side effects lorazepam thymene celebrex zetia cuckooflower effexor xr histogram valium online coreg unround acai weight loss prilosec monoammonium levofloxacin order viagra effexor side effects buy ambien keppra urethrotome buy phentermine depakote subchassis brightwork behavioural urinative cheap cialis amoxicillin dosage topamax side effects omnicef tretinoin archivist bcaa hydrocodone apap cheapest cialis adenosis neutropause unbonded phentermine online ylangol autoecholalia avandamet diclofenac sodium effexor cordarone purim tramadol medication nucleochronology evista doxazosin cheap adipex online varicoblepharon amaryl finasteride pugilistic retin sixteen tylenol with codeine antibrucellar site cialis cheap valium crestor microstrip exelon buy vicodin levofloxacin carisoprodol mobic coq10 Interfering uncinate stomatoplasty plottiness betcha bloodless cowcatcher unrealizability loranskite homoeopathy norpinane plasterboard. Mycelium menacingly, ejector springback underexposure period! Sluttish nebule sambucinin mesotendon flindersin pronghorn echolocation azole.

       

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