共查询到20条相似文献,搜索用时 281 毫秒
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针对西汉高速公路七亩坪和傅家河弃渣综合治理问题,分析了弃渣场地形、地貌和地质及所处区域的自然特征,依据开发建设项目水土流失防治、景观生态学及环境生态学原理和实际情况,提出了相应的防治对策。 相似文献
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生产建设项目弃渣(土)场水土流失特征与防治措施 总被引:5,自引:0,他引:5
生产建设项目弃渣场种类繁多,弃渣成分、结构复杂,各类弃渣场的侵蚀形式、机制不尽相同,不易实施适宜的水土保持措施,致使弃渣场水土流失十分严重。通过介绍弃渣场存在的各类土壤侵蚀型式、归纳土壤侵蚀类型、分析岩土侵蚀特点,指出影响弃渣场土壤侵蚀的主要因素有排弃方式、组成物质、坡面以及堆积时间等。结合保证弃渣场安全稳定、恢复土地生产力的弃渣场水土流失防治目标,分析现有水土保持措施特点,提出健全弃渣场水土流失防治措施体系的建议,为弃渣场的水土流失防治提供科学依据。 相似文献
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弃土弃渣是工程建设的产物,如何安全、合理地堆放弃土弃渣是工程建设单位必须考虑的现实问题。陇南土石山区高速公路工程弃渣量大且石多土少,受地形条件限制,弃渣场选址比较困难,若选址不合理或水土流失防治措施设计不合理,则会导致严重的水土流失问题。通过对位于陇南土石山区的十堰至天水高速公路甘肃段36个弃渣场位置、弃渣量、占地面积、堆渣高度、水土流失防治措施等基本情况进行调查,评价其水土流失防治效果,分析了弃渣场水土流失防治存在的主要问题,并提出弃渣场水土流失防治措施体系主要包括渣脚拦挡、斜坡防护、渣顶整治和截排水工程,应根据弃渣场类型、堆渣高度、渣体性质、弃渣场的综合利用方向等合理确定具体的防治措施。 相似文献
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水力风力交错侵蚀区弃渣场水土保持防治措施探讨 总被引:1,自引:0,他引:1
郭建华 《水土保持应用技术》2016,(2):12-13
以赤峰市林西县东台子水库弃渣场为例,针对水力风力交错侵蚀区大型沟道型弃渣场的弃渣堆放特点,环境特点、安全稳定要求及水土保持总体防治要求,提出了弃渣场渣脚修建挡渣墙、堆渣边界修建截水沟、渣面土地整治后采取草方格沙障及植树种草绿化等防护措施,形成综合的水土保持防治体系,可为水力风力交错侵蚀区弃渣场水土流失防治提供借鉴经验和帮助。 相似文献
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以内蒙古自治区赤峰市林西县东台子水库弃渣场为例,针对大型沟道型弃渣场的弃渣堆放特点、区域环境特点、工程安全稳定要求及水土保持总体防治要求,提出了在弃渣场渣脚修建挡渣墙、堆渣边界修建截水沟,对渣面土地整治后采取草方格沙障及植树种草绿化等建议,以形成综合的水土保持防治措施体系。 相似文献
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开发建设项目弃渣场设计及防洪问题 总被引:12,自引:1,他引:12
开发建设项目建设中,合理选取弃渣场,利用弃渣场弃渣是防止水土流失的重要环节,也是提高拦渣效率的重要保证。荒坡弃渣场设计应分析荒坡上加载弃渣后是否仍处于稳定状态,荒沟弃渣场设计应分析排水沟的泄洪能力,沟台地弃渣场挡渣墙与河滩弃渣场挡墙的设计应分析墙前冲刷深度。 相似文献
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邹维 《水土保持应用技术》2012,(3):16-18
弃渣场是开发建设项目水土保持重点防治区域,弄清该区域水土流失特征,总结其水土流失规律,对正确评价开发建设项目水土流失影响,科学预测水土流失强度和水土流失量,合理布设水土保持措施具有重要意义。大陆性干旱气候区,降水稀少,水土流失以风蚀为主,因此,仅对其风蚀特征进行观测研究。选取新疆波波娜水电站有代表性的4#弃渣场作为研究对象,采用降尘缸法观测侵蚀量,对2009、2010年观测数据进行计算和分析,结果表明,该弃渣场风蚀模数小于对照区,不是水土保持方案预测的水土流失主要区域,而坝址区、土料场和砂石料场及临时公路的侵蚀模数要远大于弃渣场,打破了传统思维,使研究人员对以硐室岩石爆破作业后堆放的内陆干旱区弃渣场的风蚀特征有了新的认识。对于今后遇到类似工程,希望能起到借鉴作用。 相似文献
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Suyundukov Ya. T. Suyundukova M. B. Bezuglova O. S. Khabirov I. K. Khasanova R. F. Semenova I. N. Rafikova Yu. S. Ilbulova G. R. 《Eurasian Soil Science》2022,55(1):27-35
Eurasian Soil Science - The results of the study of the properties of urban soils of the city of Sibay located in the mining region of the Republic of Bashkortostan are presented. A specific... 相似文献
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Kholodov V. A. Farkhodov Y. R. Yaroslavtseva N. V. Ziganshina A. R. Maksimovich S. V. 《Eurasian Soil Science》2022,55(7):998-1004
Eurasian Soil Science - Layers were step-by-step removed from macroaggregates (2–1 mm in diameter) of Protocalcic Chernozems via successive abrasion in a revolving rotator during 5, 10, 15,... 相似文献
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姬松茸多糖提取工艺的优化 总被引:8,自引:0,他引:8
对姬松茸子实体多糖提取的工艺条件中的多糖提取温度、提取时间、浸提液pH值3因子的最优化组合问题进行了定量研究,建立了具有良好预测性能的姬松茸多糖提取条件的模型,并利用回归模型对工艺条件的最优化组合,对各单因子要素的多糖得率及其交互作用进行了探讨。试验表明,当浸提温度为100℃、浸提时间为3h、浸提液pH值为6.3时多糖得率处于较高水平 相似文献
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《Communications in Soil Science and Plant Analysis》2012,43(15-16):1631-1646
Abstract Brazil has approximately 30 million hectares of lowland areas, known locally as “Varzea,”; distributed throughout the country. Soils in these areas have the potential to support agricultural production, but very little is known about their fertility. The current experiment was undertaken to characterize the chemical and physical properties of representative “Varzea”; soils collected at 0–20, 20–40, 40–60, and 60–80 cm depth intervals from 23 sites in Goias State of Brazil. Organic matter contents averaged 42 g/kg in the surface 20 cm of soil and should make a significant contribution to overall nutrient availability. Soil pH increased slightly with depth from a mean value of 5.2 in the surface 20 cm of soil to a mean value of 5.4 in the 60–80 cm depth interval. Several soils had exchangeable Al values ≥ 1.0 cmol Al/kg, but soil Al saturation was generally less than the 60% level frequently associated with Al toxicity. However, cereal and legume production could benefit from lime addition in many of these soils. Although base saturation was fairly low in some soils, exchangeable Ca and Mg levels were, in general, adequate throughout the profile. Extractable P levels were adequate in most surface soil samples. Extractable K levels in these soils were generally low, and the application of K fertilizers should be beneficial, especially in conjunction with lime addition. The high clay content “Varzea”; soils of the Brazilian lowlands have some drainage problems but generally exhibit favorable chemical properties for crop production when compared to soils of the well‐drained Cerrados. 相似文献
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Ye. V. Rogozhina N. V. Kostina L. S. Malyukova 《Moscow University Soil Science Bulletin》2011,66(1):32-35
An estimation of potential nitrogen-fixing activity of various soil types under agrophytocenoses of tea, filbert, peach, and
pawpaw which grow in the area of Greater Sochi is given. High indicators of nitrogen fixation activity in the soil in the
course of vegetation were characteristic of agrocenoses of pawpaw, peach, and filbert. The lowest level of nitrogen fixation
was noted in the soil of a tea plantation. A negative correlation dependence of potential nitrogen-fixing activity on the
acidity of the soil solution was established. A study of the seasonal dynamics of the activity of nitrogen fixation of soils
of agrocenoses of the subtropical zone of Russia made it possible to distinguish a less active winter and more active spring-summer-autumn
periods. 相似文献
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淤地坝坝体体积的计算 总被引:3,自引:1,他引:3
对于已确定的淤地坝坝址,坝体的纵断面(即沟道横断面)是一定的。根据实测的沟造横断面,以沟底最低点为坐标原点,沟道一侧的岸壁曲线可用幂函数形式表示之。利用这种幂函数关系,对于坝坡均一的坝体.在设定坝顶宽、坝高和上下游边坡之后,作者推导出沟道一侧坝体体积的计算公式;沟道两侧的坝体体积即为坝体总体积。对于非均一坝坡、设有马道的坝和坝体加高的体积,可将坝体横断面分割为由几个均一坝坡组成的坝体断面,分别计算其体积。这种计算方法的精度,取决于坝址横断面岸壁曲线回归方程与实际岸壁的符合程度。 相似文献