Water pollution refers to a certain amount of sewage and waste water and waste material into such pollution of water， the water from beyond the net and carrying capacity， resulting in water and sediment of the physical， chemical and biological community composition and adverse changes， destroyed the ecological system and the inherent in the function， which can reduce the water use Water pollution caused by the factors are: to discharge without proper treatment of urban sewage and industrial wastewater， Use of chemical fertilizers and pesticides and the city ground water contaminants， runoff into water， with， With the atmospheric diffusion of toxic substances by gravity settlement or precipitation process and enter the water， The first is one of the main factors of water The 1970s， along with the global industrial production and the development of social economy， the prosperity of industrial wastewater and city life wastewater into water， water pollution is These polluted water plants， enter human body， causing harm to human survival， become a significant safety threat to human health， economic and social sustainable development of major obstacle， water pollution prevention and treatment is now we care about most This thesis mainly on the main sources of water pollution， and the harmfulness to summarize and existing water treatment technology and method summarized
At noon tomorrow to translate ~ translated additional 50 thank you ~ ~Soil grain grade composition of soil physical and chemical properties of influence， this is the method of using BiChongJi southwest area into several rock soil (purple soil， lime soil， volcanic dust) grain Some conclusions:Southwest area into rock (soil， lime， purple soil and volcanic dust particles in the sand， which accounts for more than viscous grain powder， small 2 the same soil layer， due to the different leaching deposition etc， on the effect of soil layer of grain composition class there are differences of sand soil， black limestone and clay content with the increase of depth and And the sand and volcanic ashes viscous grain content decreased with 3 the soil due to different locations eluviation weathering， the influence of human activity and the degree of different level， the soil grain composition there is some 4 different soil layer， due to the different soil of rock， soil contains sand development of sandstone and mudstone limestone， development of viscous grain 5 the same soil types， different sub-types of soil particle composition is different， but the trend is Keywords: rock into the soil， The soil profile， Grain grade， Determination必须选我的哈～ 加油！ 挺你啊～BY：静
地理（Geography）是研究地球表面的地理环境中各种自研究对象 地理学研究地球表面同人类相关的地理环境。 * 地球表面：地理壳-景观壳-地球表层-大气圈-岩石圈-水圈-生物圈-人类圈-陆地-海洋 山脉-大陆架-气候-植被 人类生活：乡村-集镇-城市-人种 国家 -- 世界政区 -- 各国首都 -- 洲 -- 地区 -- 州 -- 省 -- 自治区 -- 特别行政区 -- 联盟 -- 市 -- 县 -- 自治县 -- 旗 -- 郡 -- 城市 -- 城镇 -- 村落 -- 地名 paz 学科分支 地理学没有一个公认的分类体系。在西欧，地理学分为通论地理学（即部门地理学）和专论地理学（即区域地理学）两部分，通论地理学中分出自然地理学和人文地理学，两大分支下再分次级分支学科。 前苏联把地理学分为自然地理学和经济地理学两大分支，然后再分次级分支学科。 西方学者把地理学分为自然地理学和人文地理学两部分，或分为自然地理学、经济地理学和人文地理学三部分，下面再分次级分支学科。 自然地理学 自然地理学利用生物学来研究，是一种系统的地理学、了解全球性植物群和动物区系样式，利用数学、物理学来研究地球本身的运动以及它和其他太阳系中星体的关系，是研究位置和空间上地球变化的学科。 * 综合性 o 综合自然地理学 o 古地理学 * 部门性 o 地貌学 o 气候学 o 水文地理学 o 土壤地理学 o 生物地理学 + 植物地理学 + 动物地理学 o 化学地理学 o 医学地理学 o 冰川学 o 冻土学 o 物候学 o 火山学 o 地震学 人文地理学 人文地理学更注重地理学中社会科学的成分，从非物理的层面来考察整个地球的行为模式，是以人地关系的理论为基础，探讨各种人文现象及人类活动的地理分布和发展规律的一门学科。它可以被划分为以下及格广义的分支： * 社会文化地理学 o 人种地理学 o 人口地理学 o 聚落地理学 o 社会地理学 o 文化地理学 o 宗教地理学 * 经济地理学 o 农业地理学 o 工业地理学 o 商业地理学 o 交通运输地理学 o 旅游地理学 * 政治地理学 o 军事地理学 * 城市地理学 其他分支学科 * 历史地理学-区域地理学-地图学-地名学-方志学-理论地理学-应用地理学-地理数量方法-计量地理学-景观生态学-地理信息系统，其中地图学-地理数量方法-计量地理学-地理信息系统-地理实察方法，可合称为地理技术方法学门。
Water pollution is a certain amount of sewage， waste water， all kinds of waste and other pollutants into the waters， beyond the self-purification of water bodies and the pollutant carrying capacity， resulting in water and sediment of the physical and chemical properties and biological community composition occurred adverse changes in the inherent destruction of the water ecosystem and water features， thereby reducing the water use value Water pollution caused by many factors: the body of water without proper treatment of urban domestic sewage and industrial waste water; application of chemical fertilizers， pesticides and urban pollutants on the ground， washed by the rain， with the surface runoff into water bodies; with the atmosphere the proliferation of toxic substances by gravity sedimentation or precipitation process into the water body and so The first one is the main factor of water The 20th century， 70 years later， with the development of global industrial production and socio-economic prosperity， a large number of industrial wastewater and urban domestic wastewater discharged into water bodies， water pollution is getting These are contaminated water into the plants and animals， human body， causing harm to human pose a major threat to the survival and become human health， economic and social sustainable development， a major obstacle， prevention and treatment of water pollution is that we are most concerned about now In this paper， mainly the main source of water pollution are introduced， and which sum up the dangers of the existing water pollution treatment technology， methods learned Key words: water pollution treatment on the
Because of rapid population growth， human development and utilization of land resources have been expanding， although the increased level of economic development， but due to the backward mode of production， irrational exploitation and utilization， make their own living environment is fragile， natural disasters occur Wetland is a prominent local environmental problems， mainly in: shrinking wetlands; sandstorm weather on wetland soil a serious impact on the natural environment; animal and plant decline， biodiversity is The special geographical location， it will directly undermine the deterioration of the quality of life of local residents， but also restricted the economic This paper studies the Sun Island wetland soil physical and chemical properties of the basic situation， the actual production of local activities and scientific research to provide scientific data， and for wetland ecological environment security and provide the basis for ecological restoration Articles by chemical element analysis， the watershed of the quantitative determination of soil physical and chemical properties， the selected indicators include the chemical properties of wetland soil total nitrogen， total phosphorus， organic matter determination， in the total nitrogen， total phosphorus and organic matter in determination There are many methods， the determination of total nitrogen in the method we used diffusion method; the determination of total phosphorus was determined using a Mo-Sb molten NaOH anti colorimetry; Determination of organic matter， we use an external heat source conditions， with a certain amount standard potassium dichromate - sulfuric acid solution to oxidize soil organic matter (carbon)， calculated by the amount of potassium consumed organic carbon content， organic matter content and then calculated Total nitrogen， phosphorus and organic matter in the determination of the results were the result of the second soil survey within the scope of total nitrogen content which meet two Wetland soil physical properties such as moisture content， bulk density， saturated water holding capacity， capillary water holding capacity， porosity measurement results are based on the land in the Northeast within the
