|Table of Contents|

TheResponsetoSedimentNutrientChangesFromHongLakeandHumanActivitiesinJiangxiProvince(PDF)

《南京师大学报(自然科学版)》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2015年03期
Page:
99-
Research Field:
地理学
Publishing date:

Info

Title:
TheResponsetoSedimentNutrientChangesFromHongLakeandHumanActivitiesinJiangxiProvince
Author(s):
ZhangMingli12KongRanran1YangHao1XieBiao1WangXiaolei3LiYizhong1
(1.SchoolofGeographyScience,NanjingNormalUniversity,Nanjing210023,China)
(2.JiangsuCenterforCollaborativeInnovationinGeographicalInformationResourceDevelopmentandApplication,Nanjing210023)
(3.SchoolofEnvironmentalScience,NanjingXiaozhuangUniversity,Nanjing211171,China)
Keywords:
lakesedimentenvironmentchangeanalysisofnutrientelementsenrichmentfactor
PACS:
P942;X524
DOI:
-
Abstract:
Thepaperdiscussesthedistributionofnutrientelementsinthesedimentcoreandthecausesthatpeoplehadinfluencedoneco-environmentchangesoflakeduringthemodernperiodbasedontheparametersofsedimentrate,sedimentgrainsize,nutrientenrichmentconcentration(TN,TPandTOC)andenrichmentfactor(EF).Theresultshowedthattheconcentrationsofnutrientelementsincreasedalongthesedimentcoresfromthebottomtothetop.Accordingtothe210PbexCRSmodel,weestimatedtheaveragesedimentrate0.407g/(cm2·a).aandcomparedthedifferentnutrientelementscontent,andanalyzedeco-environmenteffectthatthepeopleactivitiesmightcause.From1862to1949,thecontentofTOC、TNandTPisrelativeloweranditillustratedthattherewerelesshumanactivitiesthatinfluencedtheeco-environmentchange.From1949to1978,TOC、TNandTPcontentsincreasedsignificantly,andthehigherEFexhibitedthenutrientelementsverticalvariationofamplitudebecameenlarged.Inthisperiod,theincreaseofhumanactivitiessuchasdeforestationresultedinthehighernutrientelementcontent.From1978to1997,theincreasingofsedimentnutrientandthepromotionoftheprimaryproductivityshowedthelakeeutrophicationbegantoemerge,anditwashumanactivitiessuchaslivestockpollutionthathadbecomethemainfactorsinfluencingthelakeeco-environmentchange.From1997to2011,thecontentsofnutrientkepthighervalueandtheEF>1.5showedthatlakeeutrophicationaggravated,andthehumanactivitieswasthemainfactorthataggravatedtheeco-environmentproblem.

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Last Update: 2015-09-30