Designing an optimal multivariate geostatistical groundwater quality monitoring network using factorial kriging and genetic algorithms   总被引：1，自引：0，他引：1  

Ming-Sheng Yeh  Yu-Pin Lin  Liang-Cheng Chang 《Environmental Geology》2006,50(1):101-121

The optimal selection of monitoring wells is a major task in designing an information-effective groundwater quality monitoring network which can provide sufficient and not redundant information of monitoring variables for delineating spatial distribution or variations of monitoring variables. This study develops a design approach for an optimal multivariate geostatistical groundwater quality network by proposing a network system to identify groundwater quality spatial variations by using factorial kriging with genetic algorithm. The proposed approach is applied in designing a groundwater quality monitoring network for nine variables (EC, TDS, Cl⁻, Na, Ca, Mg, SO ₄ ²⁻ , Mn and Fe) in the Pingtung Plain in Taiwan. The spatial structure results show that the variograms and cross-variograms of the nine variables can be modeled in two spatial structures: a Gaussian model with ranges 28.5 km and a spherical model with 40 km for short and long spatial scale variations, respectively. Moreover, the nine variables can be grouped into two major components for both short and long scales. The proposed optimal monitoring design model successfully obtains different optimal network systems for delineating spatial variations of the nine groundwater quality variables by using 20, 25 and 30 monitoring wells in both short scale (28.5 km) and long scale (40 km). Finally, the study confirms that the proposed model can design an optimal groundwater monitoring network that not only considers multiple groundwater quality variables but also monitors variations of monitoring variables at various spatial scales in the study area.  相似文献   

Challenging assumptions of future coastal habitat development around the UK     

Julian D. Orford  John Pethick 《地球表面变化过程与地形》2006,31(13):1625-1642

One habitat management requirement forced by 21st century relative sea‐level rise (RSLR), will be the need to re‐comprehend the dimensions of long‐term transgressive behaviour of coastal systems being forced by such RSLR. Fresh approaches to the conceptual modelling and subsequent implementation of new coastal and peri‐marine habitats will be required. There is concern that existing approaches to forecasting coastal systems development (and by implication their associated scarce coastal habitats) over the next century depend on a certain premise of orderly spatial succession of habitats. This assumption is shown to be questionable given the possible future rates of RSLR, magnitude of shoreline retreat and the lack of coastal sediment to maintain the protective morphologies to low‐energy coastal habitats. Of these issues, sediment deficiency is regarded as one of the major problem for future habitat development. Examples of contemporary behaviour of UK coasts show evidence of coastal sediment starvation resulting from relatively stable RSLR, anthropogenic sealing of coastal sources, and intercepted coastal sediment pathways, which together force segmentation of coastal systems. From these examples key principles are deduced which may prejudice the existence of future habitats: accelerated future sediment demand due to RSLR may not be met by supply and, if short‐ to medium‐term hold‐the‐line policies predominate, long‐term strategies for managed realignment and habitat enhancement may prove impossible goals. Methods of contemporary sediment husbandry may help sustain some habitats in place but otherwise, instead of integrated coastal organization, managers may need to consider coastal breakdown, segmentation and habitat reduction as the basis of 21st century coastal evolution and planning. Copyright © 2006 John Wiley & Sons, Ltd.  相似文献   

浙江省滨海平原地下水开采与地面沉降   总被引：6，自引：0，他引：6  

赵建康  吴孟杰  刘思秀  沈慧珍 《高校地质学报》2006,12(2):185-194

浙江省滨海平原地面沉降自20世纪60年代发生以来，随着地下水的不断开采，造成洪涝灾害加剧、海潮上岸、城市排水排污能力削弱，内河通航能力下降、农田长年受淹等危害，影响社会经济的可持续发展。根据多年来的地面沉降与地下水动态监测、调查成果，对浙江省滨海平原地面沉降历史与现状、地面沉降基本规律进行总结，提出地面沉降防治对策建议  相似文献   

海潮引起滨海含水层地下水位变化的初步研究   总被引：6，自引：0，他引：6  

阮传侠周训  欧业成方斌 《地质通报》2006,25(4):512-515

依据短序列和长序列的潮汐效应观测数据,分析了北海地区海潮引起滨海含水层地下水位变化的动态特征.结果表明,受海潮影响的滨海含水层地下水位与海潮有相似的波动特征,但变幅减小,受海潮的影响程度与观测点离海岸的距离有关,随着离海岸距离的增加地下水位的变幅和潮汐系数大致呈负指数减小.在南、北海岸距离海岸分别达3756m和2276m以远时地下水位不受海潮变化的影响.长序列的观测资料显示,海潮和岸边地下水位有15天的长周期和1天的短周期的波动.  相似文献   

卡尔曼滤波在沿海冬半年风力预报中的应用   总被引：6，自引：0，他引：6  

卢峰本 《气象》1998,24(3):50-53

应用卡尔曼滤波方法,制作１９９５年１１月和１９９６年１月防城港市逐日最大风力３６￣１３２小时预报,预报结果精度高,表明该方法在沿海冬半年风力的预报上很有实用价值。  相似文献   

山东枣庄地区辐射逆温及其影响   总被引：1，自引：1，他引：0  

郑全岭  崔秀兰 《气象科学》1998,18(2):156-161

本文运用1981年11月17日-12月16日共30天实地考察资料,分析了山东枣庄地区冬季辐射逆温时空变化规律。并探讨了辐射逆温的生成与云量、风速的关系。  相似文献   

EQUILIBRIUM COASTAL PROFILES:Ⅰ. REVIEW AND SYNTHESIS   总被引：3，自引：0，他引：3  

高抒 《中国海洋湖沼学报》1998,16(2):97-107

naomONProfilesonsandycoastSaresiInilarintheirmorphologyundersjmilarndbotandhydrodynandc(tidaluntandwave)conditions.SuchanobservationhastaltotheconceptofcoastalequilibriunLAssodatalwiththeconceptareanUInbeofcrudelissues,indudingt(i)theevidencetodemonstratetheexisteneeofequilibriny(ii)calculationsoftheshapeofanequilibriumcoastalprofile,and(iii)theperiodoftimerequbotoaschtheequilibriumstate(knownastheresponsetiIne).TherehaveformanyeffortSlookingforsolutionstotheseprobbo,sincethestudAsundCftak…  相似文献   

PRELIMINARY STUDY ON PISIONIDS (ANNELIDA:POLYCHAETA PISIOMDAE) FROM HAINAN ISLAND COASTAL WATERS, SOUTH CHINA SEA     

吴宝铃  丁志虎  黄凤鹏 《中国海洋湖沼学报》1998,(2)

MODUcTIONThislistof4pisionidspedesisoneofthecontributi0nstothestudyoflittofalmeiofaunaIp0lychaetesfromtheChinesecoast.ThernateriaIswerecoforduringashortexpeditiontoHainanIslandbyProfB.L.Wu,Mr.F.P.HuangandMr.Z.H.ixngoftheFirstInstituteofdrinography,StatedrinicAdndnisttationinQingdaoandProfDr.W.WeStheideandDr.G.PurschkeoftheUniversityofDenabruckinOct0berl99l,additionalmateriaIsweresamPledbyMr.Z.H.Dinginash0rtexpeditiontoHongkonginJanuary1995.Hithert0,onlyPtrionelevisetoSaZhao…  相似文献   

EQUILIBRIUM COASTAL PROFILES:Ⅱ. EVIDENCE FROM EOF ANALYSIS     

高抒 《中国海洋湖沼学报》1998,(3)

IamODUCTIoNInoIdertoestablishtheconceptofeqUilibriumforbeachprofiles,anuInberofproh-lemsmustbesolved,including:(i)pndoftheealstehceofeqUilibrium;(ii)definitionoftheshapeofaneqUilibriumcOaStalprofile;and(iii)evaluationofthePeriodoftimere-qUiredtoreachtheeqUilibritunstate(knownastheresPOnsetime).Forthefirstoftheseprohlems,areviewofpreviousinvestigationsandaSynhesisarepresentedelsewhere(GaoandCollins,1998).Accowhngtosuchtheoreticalconsidera-tions,threetwrsofeqUilibriurnInayoccurinnatllT…  相似文献   

Sustainable development and coastal management of tidal flat in Jiangsu Province, China     

黄巧华  陈方  朱大奎 《中国地理科学(英文版)》1998,8(1):33-43

ＳＵＳＴＡＩＮＡＢＬＥＤＥＶＥＬＯＰＭＥＮＴＡＮＤＣＯＡＳＴＡＬＭＡＮＡＧＥＭＥＮＴＯＦＴＩＤＡＬＦＬＡＴＩＮＪＩＡＮＧＳＵＰＲＯＶＩＮＣＥ,ＣＨＩＮＡ①ＨｕａｎｇＱｉａｏｈｕａ（黄巧华）１ＣｈｅｎＦａｎｇ（陈方）１,２ＺｈｕＤａｋｕｉ（朱大奎）１１...  相似文献