PPD + PDD · DAY 03EN / 中文 / ES
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SITE, ENVIRONMENT, CLIMATE & ZONING
Contour density &
landform recognition
SHR.D1.TOPO.001 R2
Key takeaway
Read spacing first, then elevations, then water flow.
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COURSE ROADMAPPPD + PDD
PPD + PDD — 60-Day Course
A structured path through Project Planning & Design and Project Development & Documentation.
Exam-weight rating: R3 CoreR2 StandardR1 Peripheral
01
Site, Environment, Climate & Zoning
D3–D9 · PPD focus
Contours & Topography · Photovoltaic Systems33 knowledge points
04Wind & Natural Ventilation · Climate-Type Strategies28 knowledge points
05Earth Sheltering · Hydrology & Site DrainageContinue through the module
ILLUSTRATED KNOWLEDGE POINTDAY 03
Valley V-rule
SHR.D1.TOPO.002 R2
When a contour crosses a valley or stream channel, the V points upstream toward higher elevation. Water flows in the opposite direction.
Key takeaway
The contour V points upstream; water flows downhill.
Exam trap
Check the elevation labels before choosing the flow direction.
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Course knowledge pointSHR.D1.TOPO.002Practice course reference
IN THE COURSEDAY 03
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Valley V-rule
SHR.D1.TOPO.002 R2
The V in a contour points upstream toward higher elevation. Water flows toward the lower elevation.
Key takeaway
Open the course ↗Recognize the shape. Check the labels. Follow the flow.
LESSON PRACTICE EXAMPLEPPD
Site & EnvironmentMultiple Choice
A contour line crosses a stream and forms a V. The V points northeast toward elevation 220 ft; elevations decrease southwest. Which direction does water flow?
Explanation
A valley V points upstream toward higher elevation, so water flows southwest toward lower elevation.
Course reference: Day 03 · SHR.D1.TOPO.002
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PPD + PDD · DAY 03
Topography &
site design
SHR.D1.TOPO.002 R2
Understand how contours, elevations and drainage work together.
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EXAMPLESFind where a topic livesWhere is the valley V-rule explained? ↗Learn a topic in depthExplain SHR.D1.TOPO.002 step by step. ↗
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