简介：河的健康生活是对他们的生活条件的描述，并且它也与人的社会是对河的功能和关系的一个全面评价。Throughanalyzing人和河生态系统，连续流动，为水的安全的河隧道和沉积交通，好水质，持续的河生态系统和给水能力的要求被认为是健康黄河的符号。最小量，最大的洪水排出能力，满满的分泌物，泛滥平原的横向的斜坡，水质度，沼泽地区域，水的生态系统，和给水能力，总共八量的指示物被放作为健康黄河的符号，并且他们的相应标准redetermined基于有历史的水文学数据和1956-2004的观察数据的分析。

简介：TheimpactsofclimatechangeonChina'sagriculturearemeasuredbasedonRicardianmodel.Byusingcounty-levelcross-sectionaldataonagriculturalnetrevenue,climate,andothereconomicandgeographicaldatafor1275agriculture-dominatedcountiesintheperiodof1985-1991,wefindthatbothhighertemperatureandmoreprecipitationwillhaveoverallpositiveimpactonChina'sagriculture.However,theimpactsvaryseasonallyandregionally.Highertemperatureinallseasonsexceptspringincreasesagriculturalnetrevenuewhilemoreprecipitationisbeneficialinwinterbutisharmfulinsummer.Applyingthemodeltofiveclimatescenariosinthe2020sand2050sshowsthattheNorth,theNortheast,theNorthwest,andtheQinghai-TibetPlateauwouldalwaysbenefitfromclimatechangewhiletheSouthandtheSouthwestmaybenegativelyaffected.FortheEastandtheCentralChina,mostscenariosshowthattheymaybenefitfromclimatechange.Inconclusion,climatechangewouldbebeneficialtothewholeChina.

简介：用准确的稀释倍数计算ＢＯＤ＿５值林玉美（三明市环保监测站）本文引用陈美芳［１］从理论上探讨出一个简单可靠、适用性强的确定水样稀释倍数的公式，算出稀释倍数后，又按测定ＢＯＤ５的要求，将样品五天培养后溶解氧的减少值占培养前溶解氧值的４０％－７０％［２］这...

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简介：TheeasternandwesternfrontsofplatemovementinTaiwanIslandandTibetanPlateaurespectivelyarethetwomajorsourcesoftectonicforceforthemorphogensisduringQuaternaryinChina'stropics.SevenexamplesofgeomorphologicaleffectsofplatemovementareenumeratedtodiscussthedifferentiationoftectoniclandformsinspaceandtimeduringQuaternary.ThetectonicmovementtendstobemoreactivesincemiddlePleistocene.Somephenomenasuchasthearc-shapemountainsystems,volcanismandcrustaldeformationimplythatthejuncturezoneofeasternandwesterntectonicforcesislocatedatabout110°E.

简介：ＬｏｃａｔｅｄａｔｔｈｅｓｏｕｔｈｅａｓｔｅｒｎｃｏａｓｔｏｆＣｈｉｎａ，Ｆｕｊｉａｎｗａｓｏｎｅｏｆｔｈｅｐｒｏｖｉｎｃｅｓｗｈｉｃｈｗｅｒｅｅａｒｌｉｅｒｏｐｅｎｅｄｔｏｎａｖｉｇａｔｉｏｎａｎｄｈａｄｔｒａｄｅｒｅｌａｔｉｏｎｓｗｉｔｈｔｈｅｗ...

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