A geography problem about the diving line is solved by the master answer well and add .

1. First of all, you may not understand this contour topographic map, but you can see on the star map that this is a small river in a low mountainous area. So it's not the Yangtze River.

2. The second contour line is high in the west and low in the east, there is only one river, and the river is from west to east no matter which section of the river. So I don't choose C

3. Looking at the contour line, it can be seen that the river flows through one large river valley and two small river valleys. The rivers in the valley are generally fed by river water to recharge groundwater, except during the dry season.

4. The river in item B flows out of the valley, and the general river will be widened, but the siltation problem should also consider whether there is sediment, and the topic is not involved, so it is best not to choose.

As for the problem of the inconsistency between the diving line and the terrain you said, it is generally the same, and it is basically the same in the figure, not inconsistent, and it can be seen by carefully comparing the contour line and the diving line!

Personal opinions, welcome to question and discuss, and wish us to learn and progress together!

Section A of the river is not from east to west, but from west to east, do you see those two contour lines on the right? The contour line has a small gap where the river flows. Section A of the river flows down on a small gap in the large ridge, which is not two mountains, but a mountain, high in the west and low in the east, and the river flows through a large ridge with a small gap in the upper part and a small gap in the lower part.

The dive line of 45,40 is consistent with the altitude.

Wakaka Kaka, the geography scholarship was not in vain!!

According to the contour line, the river flows from B to A, and the water flows down, you know.

I think it's a Elimination method: B's contour line is steep and the flow speed is fast and will not silt, c is the direction of b flow ah the contour line knows d The Yangtze River starts from the mouth of Jiujiang Most of the following are plains below 200 meters less than 200 meters Uncommon So a That's right.

The direction of the dive flow, according to the arrow, it can be seen that the dive flows into the river (the upper left corner and the arrow with the lower corner), and the term should be called diving to replenish the river water. Emma, brother is not blowing, he used to be known as the first major in hydrology and engineering geology, but now after changing careers, he has less contact and almost forgotten. If you have a clear question, I can help you look it up if I don't know.

In addition, based on the density of the diving line, it can be inferred that the diving current rate is slow and rapid.

It is possible to determine whether the direction of water flow and the shape of the diving water space are continuous.

Question 9: From the contour line and contour distance of the map, it can be inferred that the ground height of place A is 55 meters, according to the distribution of the contour of the diving surface, it can be known that the height of the diving surface of place A is greater than 47 meters and less than 52 meters, so the distance between the well in place A and the ground is between 3-8 meters, so choose C

Question 10: According to the distribution of the contour lines of the diving surface, it can be seen that the diving surface of place A is much lower than the normal progressive water surface, which is mainly caused by the excessive extraction of groundwater. So choose A

Question 11: According to the latitude and longitude, this place is located along the Yangtze River near Wushan, so there is a phenomenon of drought, and a large amount of irrigation water is needed in summer, so a large amount of groundwater extraction is mainly common in July and August. So choose C

Let me try to explain this.

The landlord's two understandings are that "the left and right banks of the river and the left and right sides of the diagram should be opposites".

Facing the lower reaches of the river, the left hand side is the left bank, and the right hand side is the right bank" is all right. And that's the basis for solving this problem.

In order to understand this question thoroughly, there is also a knowledge point: whether it is diving or surface water, its flow direction is from high to low, and the shortest path is selected.

According to the relationship between the contour line and the river in this map, it can be judged that the river flows from northeast to southwest, and the underground diving level is also high in the northeast and low in the southwest. According to this, the landlord can make a perpendicular line on the isodiving position near the river, and the underground diving is from the northeast to the southwest, so the diving level on the left bank of the river is higher than the river and replenishes the river; The water level of the river on the right bank is higher than that of diving, replenishment diving. c correct.

It should be c.

The left dives are high in water and recharge the river.

Low on the right side.

Sub-question 1: c

Question 2: Analysis of Question D:

Question 1: Read the map, the solid line in the figure is the terrain contour line, the dotted line is the diving surface contour line, according to the value in the figure, the ground elevation at A is 15 meters, and the elevation of the diving surface is 10 meters, so the diving and burial depth is 5 meters, C is right.

Question 2: The water flows to a low place, and according to the contour line value in the figure, the flow of the dive is to the southeast. According to the law of change of the contour line, the denser the contour line, the greater the slope, the faster the water flow speed, the contour line is sparse, not the fastest, a wrong.

and is on the slope of a hill, not in a valley, and there is no river, bwrong. Located in a valley, there may be a river, but the elevation of the river surface is higher than the diving surface, so it is a river water replenishment dive, c wrong. The contours are the most dense, and the surface and underground runoff flow velocities are the fastest, d pairs.