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Assessment of debris flow magnitude in small catchments of the lombardy alps: the val gola case study
Val Gola Catchment Debris Flow Magnitude Assessment Frequency Analysis
2013/3/4
Debris flows are among the most destructive of all water-related disasters. They mainly affect mountain areas in a wide range of morpho- climatic environments. Therefore, accurate pre-diction of their...
本文对三江并流八大片区26个典型山地土壤剖面进行了土壤形成条件调查和理化性状分析,依据《中国土壤系统分类检索(第三版)》,鉴定了诊断层和诊断特性,明确供试剖面在中国土壤系统分类中的归属。检索结果共有6个土纲(富铁土、淋溶土、灰土、雏形土、新成土、潜育土),11个亚纲,17个土类,18个亚类。总体上,随海拔升高该区土壤依次为富铁土、淋溶土、灰土、雏形土。并与发生分类和国际土壤分类参比基础进行了参比。
西北干旱区域水资源可持续利用评价指标体系的构建
区域水资源 承载能力 可持续利用 评价指标体系
2011/9/5
水资源是人类赖以生存和发展的一个极其重要的因素。水资源的可持续利用是实现人类社会经济、资源、环境协调发展的基本前提。笔者针对西北干旱区独有的气候水文特征,从区域水资源与区域经济社会的相互关系出发,从区域水资源承载力的本质概念进行分析,拓展认识和界定区域水资源储备量和区域水资源承载能力的内涵意义。基于区域水资源的储备、消耗、再生的3大功能过程,考虑区域社会调节活动对区域水资源功能过程的影响,构建了1...
Use of Bio-Resources for Remediation of Soil Pollution
Soil pollution Bioremediation Phytoremediation Metals Organic Pollutants Rhizosphere
2013/3/11
In recent years, economic boom in fast developing countries has been witnessed with spectacular progress in industri- alization and concurrent progress in modern agriculture. Such development is howev...
围海造田是沿海地区拓展土地面积的主要途径。土壤氮矿化参数是揭示围海造田土壤肥力演变和土壤氮供应的重要指标,但是我国沿海造田土壤的相关研究少有报道。本研究以杭州湾南岸海积平原上慈溪市1000年和520年筑塘造田区为对象,选择4个代表性采样点,每个点从低洼稻田采集1个表层混合水稻土,在其相邻高地采集1个表层混合旱地土壤,共8个样品。采用间隙淋洗法研究了土壤样品氮矿化动力学特征。结果如下: 119 d培...
酸铝胁迫下4个速生桉优良无性系的生长反应
酸铝胁迫 生长 无性系 桉树
2012/3/26
采用砂土培育法研究不同的酸铝处理对几种桉树优良无性系(巨尾桉9号、巨尾桉12号、尾叶桉4号、韦赤桉3号)幼苗生长及膜透性等变化的影响。试验设: pH 3.0+0 mg/L Al3+、 pH 3.0+120 mg/L Al3+、 pH 4.0+0 mg/L Al3+、 pH 4.0+120 mg/L Al3+、 pH 4.8+0 mg/L Al3+5个处理。结果表明,不同酸铝处理对4个桉树优良无性系...
Role of Some Effective Microorganisms in Improving Soil Properties and Productivity of Peanut under North Sinai Conditions
Microorganisms sandy soil Pea nut Bacillus Pseudomonas Streptomyces fulvissium
2010/11/15
About 77 different microbial isolates (24 Azotobacter, 14 Bacillus, 9 Pseudomonas, 14
Actinomycetes and16 Fungi), isolated from different plant rhizosphere and compost from different localities in Eg...
Distribution of natural radionuclides in anthrosol-type soil
Distribution of natural radionuclides anthrosol-type soil
2010/10/29
Taking into account the importance of distribution and transfer of radionuclides in the soil-water-plant system, especially in agricultural fields, in this study, natural radionuclide determination in...
Pathogen reduction effects of solar drying and soil application in sewage sludge
Ascaris faecal coliforms Salmonella sewage sludge soil solar drying
2010/10/29
The responses of sludge faecal coliforms, Salmonella, and Ascaris lumbricoides to heat drying, solar dehydration, and inactivation in soil are examined in this study. The presence of Salmonella in raw...
Parametric modeling of root length density and root water uptake in unsaturated soil
Modeling optimization root distribution TDR water flow
2010/10/29
The problem of water movement through the root zone has attracted increasing interest during the last few decades. In this research, the spatial and temporal pattern of root water uptake in wetted soi...
Estimation of surface soil moisture and roughness from multi-angular ASAR imagery in the Watershed Allied Telemetry Experimental Research (WATER)
Estimation surface soil moisture roughness multi-angular ASAR imagery Watershed Allied Telemetry Experimental Research
2013/9/2
Radar remote sensing has demonstrated its applicability to the retrieval of basin-scale soil moisture. The mechanism of radar backscattering from soils is complicated and strongly influenced by surfac...
湖州市不同土地利用类型土壤中多环芳烃的分布及来源
土壤 多环芳烃 土地利用类型 湖州
2014/6/12
通过对湖州地区74个土壤样品多环芳烃含量的测定,分析了湖州市不同土地利用类型土壤中多环芳烃的含量特征及污染水平。结果表明,湖州市区耕地中多环芳烃的含量最高;从低环/高环比值小于1以及芘/苯并(a)芘比值小于2,反映了湖州地区土壤中多环芳烃主要是由燃煤和生活污染所产生的。
A new soil freeze/thaw discriminant algorithm using AMSR-E passive microwave imagery
soil freeze/thaw status microwave radiometer discrimination analysis AMSR-E
2013/9/2
The soil freeze–thaw controls the hydrological and carbon cycling and thus affects water and energy exchanges at land surface. This article reported a newly developed algorithm for distinguishing the ...
金属铝对蚯蚓急性毒性的研究
铝 蚯蚓 急性毒性
2010/2/23
金属铝对植物具有高细胞毒性,但其对中性土壤中无脊椎动物的生态毒理研究极少。本论文采用国际标准组织(ISO)和OECD(207)指南中的滤纸接触法和人工土壤法,测定金属铝对蚯蚓的急性毒性。试验结果显示铝对蚯蚓具有较高的毒性。滤纸接触法半数致死浓度(LC50)为20-200 mg Al /l;人工土壤法LC50为518.20 mg Al /kg干土。在滤纸接触法试验中,金属铝对蚯蚓的急性毒性高于重金属...