Spatiotemporal Evolution of Planting Area and Planting Structure in the Irrigated Areas along the Yellow River in Inner Mongolia
Spatiotemporal Evolution of Planting Area and Planting Structure in the Irrigated Areas along the Yellow River in Inner Mongolia
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作者：
Li Ze-min
对内蒙古沿黄沿着4个主要灌区（河套灌区、南引黄灌区、磴口灌区和马地壕灌区）近30年来的遥感影像信息进行了提取和解译，并基于遥感手段分析了其种植面积和种植结构的时空演变。利用河套灌区7年实测样本，验证了遥感解译结果、解译精度及遥感手段的可行性。遥感解译结果表明，4个灌区的总控制面积为17845。55平方公里，1.比官方统计结果小73%。近30年来，4个灌区的种植面积和土地利用率变化不显著，且呈极低的增长趋势。但4个灌区的种植结构发生了显著变化，由早期的单一小麦种植结构发展到近30年来小麦、玉米、向日葵等多种种植结构。
In this Paper,the remote sensing image information in recent 30 years was extracted and interpreted for 4 main irrigated areas( the Hetao Irrigated Area,South Yellow River Irrigated Area,Dengkou Irrigated Area and Madihao Irrigated Area) along the Yellow River in Inner Mongolia,and the spatiotemporal evolution of their planting area and planting structure was analyzed based on the remote sensing means. The measured samples of the Hetao Irrigated Area in 7 years were used to verify the interpreted results,interpretation accuracy and the feasibility of the remote sensing means. The remote sensing interpretation showed that the total control area of the 4 irrigated areas was 17 845. 55 km2and 1. 73% smaller than that of the official statistic result. The planting area and land use rate of the 4 irrigated areas were changed insignificantly and in a very low increase trend in recent 30 years. The planting structure of the 4 irrigated areas,however,was changed significantly and evolved from the singlewheat planting structure in the early years to the diversified planting structure of wheat,corn and sunflower afterwards in recent 30 years.