地理思路（Geographical thinking）.docVIP

地理思路（Geographical thinking） First, the factors affecting the duration of sunshine 1. days long; 2. topography (high terrain, sunrise early, sunset late, sunshine longer); 3. weather conditions. Two, the factors that affect the intensity of solar radiation (that is, the influence of atmospheric radiation on solar radiation) 1. solar altitude (i.e. latitude); 2. weather conditions; 3. topography; 4. air density. For example, why is the Qinghai Tibet Plateau the strongest solar radiation? (1) the latitude is lower and the sun is larger; the weather is much higher; the terrain is high; the air is thin and the atmosphere is clean. Three, factors affecting the temperature 1. latitude; 2. topography and topography; 3. underlying surface properties (land and sea location, vegetation conditions, ocean currents, etc.); 4. weather conditions. Four, the influence factors and variation of temperature 1. latitude: low latitude, high latitude; 2., the nature of the underlying surface: Marine less than land, coastal less inland, vegetation less than bare land; 3. weather conditions in many places: cloud cloud is less than the place. Five, river governance measures Upstream: governance principle is flood control, the practice is to repair reservoirs, afforestation; In the middle: governance principle of flood diversion and flood storage, it is built in the reservoir, flood diversion and flood storage project; Downstream: the governance principle is flood discharge and water diversion. The approach is to reinforce embankments, dredge and dredge the river course, and dig the river course. Six. Analysis of the causes of river floods Natural causes (mainly from three aspects: water system features, hydrological characteristics, climatic characteristics) - Human factors (mainly from two aspects: the destruction of vegetation, weihuzaotian). For example, the cause of floods in the Yangtze river: (1) natural causes: 1. drainage features: (1) the basin is wide and the tributaries are numero