How much fresh water does Canada have? We're often told that Canada has some 20% of the world's total freshwater resources. However, the real number is closer to 7% Most of it is fossil water (water that has been undisturbed for millennia) retained in lakes, underground aquifers, and gl...
水是生命之源 Water Is Life.概要1.ppt,Water Is Life 小组成员: List Water and Life Water and Nature Water and Human Water Resource Present Situation WaterConservation As we all know, the generation of organisms must have water. Billions of years ago,wate
These pesticides and chemicals find a way into the water resources and pollute the water further. One way in which you can prevent this factor is to have a lot of plants in your garden. These act as buffers and prevent the chemicals from escaping into water bodies. In addition,reducing ...
Water Is Life小组成员:ListWater and LifeWater and NatureWater and HumanWater Resource Present SituationWaterConservationAs w
1.NaturalpollutionDuetothedissolutionofgeological,atmosphericprecipitationleaching,erosionontheground,mixthevariouspollutantsintothewater因地质的溶解作用,降水对大气的淋洗、对地面的冲刷,挟带各种污染物流入水体而形成 2.Man-madepollutionindustrialwastewater(工业废水)Dailylifesewage(生活污水)Pesticideandfertilizerpollution...
Theremainingunfrozenfreshwaterisfoundmainlyasgroundwater,withonlyasmallfractionpresentabovegroundorintheair.ThefactorswhichaffectthewaterresourcesThepresentstateofwaterresourcesThemainproblemsinChinaMakebetteruseofwaterresources Thefactorswhichaffectthewaterresources Annualrainfall Depthofrunoff Landsurfaceevaporation 1....
which replenishes aquifers naturally Evaporation and transpiration Evaporation Stream Infiltration Water table Infiltration Lake Well requiring a pump Flowing artesian well Runoff Precipitation Confined Recharge Area Recharge Unconfined Aquifer Less permeable material such as clay Unconfined Aquifer Recharge Area ...
6、mplicated as it is serious.What should we do to solve this problem Gradually?Solution16For government1To establish the urban sewage treatment system (城市污水处理系统的建立)2 To restructur the Industrial(调整产业结构)3.To develop the new water sources4.To strengthen the planning and manageme...
WaterResource •Thewaterinearthiscirculatingconstantlyandchanging.However,theresourcesoffreshwaterarenotinexhaustible.Sothefreshwateristhemostpreciousandirreplaceablenaturalresources.Ifweseetheearthfromspace,itseemstobeabigbluewaterball.Because71percentoftheearth'ssurfaceiscoveredbywater,thetotalamountofwateris1.368...
Continental water Continental water is found in rivers, lakes and ice and snow in glaciers. It is also found as a groundwater. Vocabulary: beneath (below, under). Activity 2 page 40 Rivers Continuosly moving body of water that flows into an ocean, sea or another river. It is formed by...