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开发建设项目执行“三同时”制度存在问题及建议 总被引:1,自引:0,他引:1
开发建设项目水土保持方案是水土保持设施设计、施工、验收的重要依据 ,但不能代替水土保持设施的设计。当前 ,开发建设项目水土保持方案的实施严重滞后于主体工程 ,且实施不到位或得不到实施的情况普遍存在。建议水利部明确对开发建设项目水土保持设施分级验收的权限 ,并尽快制定《开发建设项目水土保持设施验收规程》。 相似文献
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开发建设项目水保设施验收评估要点 总被引:3,自引:0,他引:3
自水利部于2002年发布《开发建设项目水土保持设施验收管理办法》以来,开发建设项目水土保持设施验收技术评估逐步向程序化、规范化开展。技术评估工作具有为水土保持设施行政验收提供技术支撑和行政职能外延的双重作用。根据技术评估工作实践,结合法律、法规和规范性文件要求,提出火电、水电、核电、输变电、交通、水利等行业的开发建设项目水土保持设施验收技术评估工作要点,以利于开发建设项目水土保持设施验收技术评估工作的顺利开展,更好的为行政验收服务。 相似文献
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汪恕诚 《水土保持应用技术》2003,(1)
第一条为加强开发建设项目水土保持设施的验收工作,根据<中华人民共和国水土保持法>及其实施条例,制定本办法. 第二条本办法适用于编制水土保持方案报告书的开发建设项目水土保持设施的验收. 编制水土保持方案报告表的开发建设项目水土保持设施的验收,可以参照本办法执行. 第三条开发建设项目所在地的县级以上地方人民政府水行政主管部门,应当定期对水土保持方案实施情况和水土保持设施运行情况进行监督检查. 相似文献
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《中国水土保持》2021,(8)
自2017年9月《国务院关于取消一批行政许可事项的决定》(国发[2017]46号)取消了各级水行政主管部门实施的生产建设项目水土保持设施验收审批行政许可事项,转为由生产建设单位自主开展水土保持设施验收以来,水利部全面推进国家关于"放管服"改革措施,相继颁布了一系列关于生产建设项目水土保持设施自主验收的政策文件,生产建设项目水土保持工作逐步向加强监管转变。新形势下,有关生产建设项目水土保持技术服务的政策、规程、标准等陆续更新,生产建设项目水土保持设施验收不仅评估程序发生了变化,而且评估内容要特别指出影响通过竣工验收的若干因素。通过对生产建设项目水土保持设施验收相关政策和文件的研学,结合工作实践,阐述了新形势下生产建设项目水土保持设施自主验收的制约性因素,希望对第三方评估机构开展水土保持技术咨询工作有所启示。 相似文献
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<正>2012年7月24日,河北省隆化县水务局组织开展了对承德天宝矿业集团大昌矿业和双盈矿业铁选厂项目水土保持设施的验收。验收专家严格按照《开发建设项目水土保持设施验收管理办法》有关规定,通过实地查看项目施工现场水土保持设施,审核水土保持监测总结报告和水土保持设施技术评估报告,逐项比对批准的水土保持方案内容,并全面细致地就设施的施 相似文献
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我国开发建设项目水土保持现状及发展趋势 总被引:30,自引:7,他引:30
通过分析我国自然资源分布特点、经济发展背景以及基础设施建设快速发展现状,对全国各行业开发建设项目水土保持方案编报率、开发建设项目水土流失量进行了统计,得出了开发建设项目在实施水土保持监理、监测和水土保持单项设施验收等措施后,所造成的水土流失得到有效控制、生态环境得到有效改善的发展趋势。 相似文献
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安阳市近10年来建成的水土保持工程的主要建设管理方式可分为3种,即:乡村组织治理,完成后分配给农户分散经营;乡村组织治理,由村成立专业队代表村集体管理;把小流域或荒山承包给个体或私人经济组织,由其自行治理和经营管护。3种建管方式中以后者为最优,其经济效益是分散经营管理的5倍、专业队经营管理的3.5倍。针对水保工程建设管理中存在的问题和适应农村税费改革等要求,提出了加快安阳市水保生态建设的建议。 相似文献
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我国滑坡、崩塌的区域特征、成因分析及其防御 总被引:2,自引:0,他引:2
论述了我国滑坡、崩塌的区域分布特征,滑坡和崩塌的危害程度,滑坡和崩塌类型和成因分析,并且提出了灾害的防御措施,以期达到环境保护成为社会发展过程中的一个重要组成部分。 相似文献
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Much evidence has indicated that the occurrence of montmorillonite and vermiculite containing Al-interlayers is very common in solis, particularly acid soils. Viewed in the light of soil clay minerology, it would be required to investigate the properties of their original minerals. For the latter purpose, the Al-interlayer has been removed prior to the Mg-glycerol,K-saturation and heating tests for identification of montmorillonite and vermiculite. Its removal has been accomplished in sevsral ways; KOH plus KCl (1), NH4F, KCl plus HCl (2), Na-citrate (3),400C de hydroxylation-NaOH (4) dissolution. Although these methods are effective for the removal of Al-interlayers, they seem drastically to affect the minerals or are time-consuming. Inthe course of the study of hydroxy-Al interlaid complexes of expanding 2:1 layer lattice clay minerals, the authors have noticed the difference between the (001) spacings of hydroxy-Al complexes of montmorillonite and vermiculite; the former exhibited the 20 A basal spacing at room temperature against the 14 A spacing of the latter. This difference might be useful for differentiating montnmorillonite-chlorite intergrades in soils. 相似文献
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为探讨硒、钴在提高苜蓿生长影响,在河南省沿黄滩区,开展了硒、钴单施和配施下对紫花苜蓿生长以及产量和品质影响研究。结果表明,硒、钴单施和配合基施均能够显著提高苜蓿从现蕾到开花期的净光合能力,降低呼吸消耗,提高单位叶面积干物质的生产速率,有利于苜蓿花前青干草生产和果实发育;其中,以硒570 g/hm2、钴762g/hm2配施下效果显著,青干草增产8.06%,种子千粒重可提高12.85%。单施钴和硒钴配施还能促进0—20 cm耕层苜蓿根瘤菌的生长和积累,增强苜蓿的固氮能力。说明硒钴合理基施对苜蓿青干草和优质种子生产具有很好的应用效果。 相似文献
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Separation and analysis of diastereomers and enantiomers of cypermethrin and cyfluthrin by gas chromatography 总被引:5,自引:0,他引:5
Synthetic pyrethroid (SP) insecticides are of environmental significance because of their high aquatic toxicity. Due to their chirality, SP compounds contain multiple diastereomers and enantiomers. However, due to great structural similarities and lack of isomer standards, gas chromatographic (GC) analysis of SP diastereomers or enantiomers is poorly developed. In this study, we used a HP-5 column to separate the diastereomers and a beta-cyclodextrin-based enantioselective column (BGB-172) to separate the enantiomers of cypermethrin (CP) and cyfluthrin (CF). Resolved peaks were identified by comparing chromatograms of isomer-enriched CP products. Diastereomers of both CP and CF were separated on the HP-5 column. On the BGB-172 column, enantiomers of all cis diastereomers were separated, while those of trans diastereomers were not separated. The elution order appears to be regulated by configuration, a finding which may allow peak identification in the absence of isomer standards. When coupled with electron capture detection, the developed methods had low detection limits and may be used for analysis of SP diastereomers and enantiomers in environmental samples. 相似文献
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Experiments were conducted to study the influences of synthetic bayerite, non-crystalline aluminum oxide (N-AlOH), goethite, non-crystalline iron oxide (N-FeOH) and kaolinite on the adsorption, activity, kinetics and thermal stability of invertase. Adsorption of invertase on iron, aluminum oxides fitted Langmuir equation. The amount of invertase held on the minerals followed the sequence kaolinite > goethite > N-AlOH > bayerite > N-FeOH. No correlation was found between enzyme adsorption and the specific surface area of minerals examined. The differences in the surface structure of minerals and the arrangement of enzymatic molecules on mineral surfaces led to the different capacities of minerals for enzyme adsorption. The adsorption of invertase on bayerite, N-AlOH, goethite, N-FeOH and kaolinite was differently affected by pH. The order for the activity of invertase adsorbed on minerals was N-FeOH > N-AlOH > bayerite > reak goethite > kaolinite. The inhibition effect of minerals on enzyme activity was kaolinite > crystalline oxides > non-crystalline oxides. The pH optimum of iron oxide- and aluminum oxide-invertase complexes was similar to that of free enzyme (pH 4.0), whereas the pH optimum of kaolinite-invertase complex was one pH unit higher than that of free enzyme. The affinity to substrate and the maximum reaction velocity as well as the thermal stability of combined invertase were lower than those of the free enzyme. 相似文献
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中国水土保持生态环境建设现状与社会经济可持续发展对策 总被引:19,自引:3,他引:16
水土流失是中国头号生态环境问题,已成为社会经济可持续发展的制约因素。从防灾减灾的角度出发,分析了中国水土流失的现状、存在问题,总结了中国水土保持工作的成绩、经验,提出了新形势下进一步加强水土保持生态环境建设的对策。 相似文献