We also had a quick look at factors that affect the shapes of hydrographs - e.g. geology, antecedent weather conditions, drainage basin size/shape, vegetation, relief, drainage density, etc. Make sure you can talk about each of these factors, and that you understand how each one would affect the shape of the hydrograph.
Tuesday, 25 September 2007
Tuesday, 18 September 2007
Sunday, 16 September 2007
What did they do well?? What needs work?? (Be gentle, bearing in mind that they had about 5 minutes to do this...)
And for the audio learners amongst you, check out The Water Cycle Song and other musical masterpieces!
Friday, 14 September 2007
First, we thought about the factors that we thought might affect rates of infiltration - they included:
- vegetation cover
- the compactness of the soil
- antecedent weather conditions
- current levels of soil moisture
- the intensity and duration of the rainfall event
You then decided how you would measure infiltration rates, and formulated your hypotheses.
You should now have a complete set of results for your group and the next thing is to write up your investigation.... Remember:
Aim - what you are trying to find out.
Hypotheses - predictions about what you think you will find. Make sure these are specific.
Method - describe what you did. This should be clear and concise, with enough detail that someone else could go out and replicate your experiment. (It shouldn't, however, be written as a set of instructions!)
Results/Data Presentation - in this case, this will be your graphs. Precisely what you are plotting will vary slightly depending on how you measured your infiltration rates. However, they should show clearly how the infiltration rate at each site changed over time.
Analysis - what do your results show? Start with general patterns and trends, and then explain in more detail. Do your results show what you expected to find? Are there any surprising results/anomalies? If so, can you explain them?
Conclusion - return to your aims and hypotheses, and sum up what you've found out.
Evaluation - how successful was your investigation? Are there things you could improve if you were to repeat the investigation? How could you extend/develop the investigation?
As I said this afternoon, the experiment we did was by no means perfect - the main aims were to get you thinking a bit, working in groups and developing some skills, and getting used to the idea of writing up a geographical investigation.
Whilst I am expecting a decent piece of work from everyone, I am not expecting pages and pages - it should be clear and concise!
Your completed work is due in on WEDNESDAY. Don't forget to come and see me or email if you have problems - don't turn up without the work!!
Thursday, 13 September 2007
You will need to know:
- key hydrological cycle terms (precipitation, evapotranspiration, surface run-off/overland flow, throughflow, groundwater flow, water table, baseflow, interception, stemflow, river discharge)
- concept of a system (closed and open... inputs, outputs, stores and flows)
- factors affecting the key processes we've talked about (eg infiltration rates varying according to amount of vegetation, etc.)
- water balance equation
- actual and potential evapotranspiration - differences between them and factors that affect them
- soil moisture budgets
Remember to keep your glossary of key words going as we go along... And don't forget the ideas for learning key words and ideas that we talked about on Tuesday - mind maps, post-its, etc.
Wednesday, 12 September 2007
Tuesday, 11 September 2007
Sunday, 9 September 2007
I also mentioned Geography Review - a magazine written specifically for AS and A2 Geography students, with articles about key topics, fieldwork, exams advice, useful websites, etc. It is published 4 times a year, and if you order through school it will cost you £12.50 for the year.I have a fair few copies that you have have a look at (including from when I did my A levels!) and we will sort out an order next week.
The book I mentioned was the Complete A-Z Geography Handbook. There is no obligation to buy this, or any other book, but if you do want to get hold of a copy, there are a few second-hand ones on Amazon at the moment and a couple of copies on that well-known auction site!
We looked at the concept of a system - you need to know the difference between a closed system and an open system. (The global hydrological cycle is a closed system, the drainiage basin cycle an open system.) Make sure you know what inputs, outputs, stores and flows/transfers are.
The Wycombe High School Geography Department have an excellent set of notes - they don't do the same specification as us, so not everything there will be relevant to you, but it is worth you having a look at the Drainage Basins as Systems and The Hydrological Cycle notes. The Drainage Basins one has a quick test for you to do to check all those key words!
Remember, there are lots of key words to learn - you are much better off learning them as you go along, rather than panicking in summer!