Identification of saline risk area and sustainable optimum water allocation for Irrigated farmland in arid region

干旱区农田盐碱风险区识别与可持续优化水分配

• 批准号: 22380129
• 负责人: AKAE Takeo
• 金额: $ 11.98万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22380129/
• 关键词: 乾燥地; 灌漑; 塩分集積; 衛星画像; 蒸発量; 地表面温度; 最適用水配分; 塩類化; Landsat; 乾燥地; 灌漑; 塩分集積; 衛星画像; 蒸発量; 地表面温度; 最適用水配分; 塩類化; Landsat

(1)A model which can estimate evaporation only by maximum and minimum ground surface temperature (MST model) was developed. Spatial distribution of evaporation of Hetao Irrigation District, Inner Mongolia, China was estimated by satellite image and MST model and the results were validated.(2)Relationship between spatial distribution of saline area in the District and topological, geographical conditions was analyzed.(3)Based on the relationship between seasonal change of annual average and deviation of NDVI (Normalized Vegetation Index) obtained by MODIS image and the estimated evaporation, saline risk area was identified.(4)As constraints of linear programming, water balance based on estimated evaporation and salt balance of each sub region was considered, and drainage water quality of each sub region was specified by a leaching efficiency coefficient. Applying linear programming, optimal sustainable water allocation was determined. The results showed that improvement of conveyance efficiency is effective as measures for improvement of the irrigation and drainage system.

（1）仅开发了仅通过最高和最小地面温度（MST模型）估算蒸发的模型。 Spatial distribution of evaporation of Hetao Irrigation District, Inner Mongolia, China was estimated by satellite image and MST model and the results were validated.(2)Relationship between spatial distribution of saline area in the District and topological, geographical conditions was analyzed.(3)Based on the relationship between seasonal change of annual average and deviation of NDVI (Normalized Vegetation Index) obtained by MODIS image and the estimated evaporation, saline （4）考虑了线性编程的约束，考虑了每个子区域的估计蒸发和盐平衡的水平，并且通过浸出效率系数指定了每个子区域的排水水质。确定了应用线性编程，最佳的可持续水分配。结果表明，提高运输效率是有效的，因为措施改善了灌溉和排水系统。