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楚雄彝族自治州属滇中干旱区。其降雨量和地表径流在省内均为低值区,年际变化大,时空分布不均。蒸发量大于降水量的3倍,为高值区。境内无湖泊,地下水不丰富,多年来,水一直是农业生产的主要制约因素。根据州情,发展节水型农业势在必行,而且具有十分广阔的前景。 1 问题的提出要改造世界,必须先认识世界。要发展彝州经济,解决人民温饱,必须先认识彝州自然条件的特点及危害农业的主要自然灾害。顺应自然规律,趋利避害,发展农业生产。彝州位于云南省的中北部,有10个县(市),境内山峦起伏、河沟纵横、高山低
Chuxiong Yi Autonomous Prefecture is arid area in central Yunnan. The rainfall and surface runoff in the province are low value areas, with large interannual variations and uneven spatial and temporal distribution. Evaporation is greater than 3 times the precipitation, high value area. There are no lakes in the country and groundwater is not abundant. For many years, water has been the main constraint on agricultural production. According to the state of the situation, the development of water-saving agriculture is imperative, but also has a very broad perspective. A question raised To reform the world, we must first understand the world. To develop the economy of Yi and solve the problem of food and clothing for the people, we must first understand the characteristics of the natural conditions of Yi and the major natural disasters that endanger agriculture. Conform to the laws of nature, seek advantages and avoid disadvantages, and develop agricultural production. Yi is located in the central and northern Yunnan Province, 10 counties (cities), the territory of undulating hills, trenches, alpine low