🌍 GEO-A* | 术语回顾 Fantastic GEO-Terms 1⃣️ (A1-1Hydrology...)
如果在复习的时候，你不喜欢文字，更喜欢图像或者视频，请去B站或腾讯视频搜【分钟地球】(也包括有趣的物理内容）.
If you feel words are too boring and you need more visual learning, do search Minute Earth. It aslo combines some fascinating physics.
圣诞前我们拿到了一张学习单上，请你标注出自己不太熟悉的部分，所以现在我们来消消看（今天的内容仅根据我所得到的反馈进行针对性复习）。
Before this holiday, William gave you a work sheet to check the unfamiliar parts, so now it is time for us to review some challenging part.
Drainage Basin
It refers to the area drained by a river and its tributaries, belonging to an open system.
授人以鱼不如授人以渔，类似概念不明了请用必应搜图。
You can aslo find the picture easily by typing drainage basin in BING images.
Hydrology
It is the study of water as it moves on, and under and through the Earth's surface.
The hydrological cycle is a global scale system of the water movement between air, land and sea in the form of water vapor, river, raindrops, frost and snow.
Now we move on to the checklist for revision.
我理解地下水是如何枯竭又如何回填的。
I understand how ground water is depleted and recharged.
You may find this link incrediblely useful:
http://www.groundwater.org/get-informed/groundwater/overuse.html
So it has two parts, first you need to define what is groundwater depletion.
Depletion is caused by overuse.
Then if it is a exam question, there will be questions asking you about the effects, mainly the negative ones from overusing groundwater.
If I were you, I will not write them down passively. But I will start to imagine where is the groundwater. It would be like this:
Or this:
That is to say, I know where it is, the water table is its "top line", if we use more groundwater, then water table will be lower. And we need to build longer well, so that is to say we cost more. And if the water is being used too much, then it is less likely to support the orginal land and supply surface water beyond it. Then the land will fall down, the surface water will be less, we call the phenomena land subsidence, and surface water reduction. It sounds awful, so no doubt it will impair water quality.
Well, you need to do the recharge yourself. If the depletion is the problem, then recharge sounds like a solution. And what else it is? Go, search it!
By the way, if you want to know more about groundwater, try another feed: http://water.usgs.gov/edu/gwdepletion.html
我清楚孔隙度与渗透率的差别。
I know the difference between porosity and permeability.
The terms porosity and permeability are related.
porosity – the amount of empty space in a rock or other earth substance; this empty space is known as pore space. Porosity is how much water a substance can hold. Porosity is usually stated as a percentage of the material’s total volume.
permeability – is how well water flows through rock or other earth substance. Factors that affect permeability are how large the pores in the substance are and how well the particles fit together.
Check more with the link: Porosity and Permeability Lab
http://www.gwisd.esc2.net/vimages/shared/vnews/stories/4ebbddc12d3a0/Porosity%20and%20Permeability%20Lab%20and%20Aquifer%20Lab2012.pdf
There are two more items you may find quite helpful, because one of them is an example in your checklist.
percolation – the downward movement of water from the land surface into soil or porous rock.
infiltration – when the water enters the soil surface after falling from the atmosphere.
By the way, it won't go too long, so just it will stop here.
Yet I understand you may also feel difficult to calculate channel effiency.
I found a revision website for you. Enjoy!
http://www.s-cool.co.uk/a-level/geography/river-profiles/revise-it/channels
See you on Thursday!