蓝色和绿色作物的水足迹的空间显式和区域化量化在一个水压河流域的水压
Saicharan Vasala1,2, Shwetha H R3
1Department of Water Resources and Ocean Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore, Karnataka 575025, India.
概括
本研究引入了一种遥感方法,用于绘制高卡弗里河流域的作物水足迹 (WF) 地图. 它将米和拉吉确定为耗水量高的作物,强调了关键的灌压力和地下水压力.
科学领域:
- 农业用水管理农业用水管理
- 遥感应用 遥感应用
- 水文学的水文学
背景情况:
- 优化作物用水利用对于可持续农业至关重要.
- 水足迹 (WF) 分析为评估水消耗提供了一个框架.
- 准确,精细的水源数据是有效的水资源管理所需要的.
研究的目的:
- 开发和应用一种遥感方法来量化特定作物的蓝色水足迹 (BWF),绿色水足迹 (GWF) 和高卡弗里河流域 (UCB) 的总水足迹 (TWF).
- 为了确定农作物和地区的高水需求和潜在的地下水压力.
- 创建一个关于作物用水消耗的区域数据集,以改善水资源管理规划.
主要方法:
- 利用遥感来得出实际的蒸发转化率 (ETa),使用植被系数 (Kv) 而不是一般化的FAO Kc表.
- 采用堆叠组合算法来缩小参考蒸发透气 (ETO) 和降雨到500米分辨率.
- 绘制季节性BWF,GWF和TWF图表,用于2015-2019年期间的选定作物.
主要成果:
- 大多数作物显示主要依赖绿水 (GW),采用最小的蓝水 (BW) 提取.
- 米 (夏季-IRR) 和拉比 (Rabi-RF) 呈现出不成比例的高BWF,表明灌压力和地下水应激热点.
- 2016年的干旱条件对拉吉的BWF和GWF产生了重大影响,证明了气候变化的影响.
结论:
- 这项研究为UCB提供了一种有价值的,高分辨率的作物水足迹数据集.
- 调查结果强调了对米和菜等作物有针对性的水资源管理战略的必要性.
- 遥感方法提供了一种可靠的方法来监测农业用水量,并为政策提供信息.
相关概念视频
States of Water
56.9K
Water exists in any one of the three classical states: solid (ice), liquid (water), and gas (steam or water vapor). The state of water depends on i) the intermolecular forces that draw molecules together and ii) the kinetic energy that leads to movements that pull them apart.
Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...
Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...
56.9K
The Water Cycle
28.5K
The Earth’s hydrosphere includes all of the areas where the storage and movement of water occurs. Since water is the basis of all living processes, the cycling of water is extremely important to ecosystem dynamics.
28.5K
Water and Mineral Acquisition
35.7K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
35.7K
Quality of Water
561
In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...
561
Regulation of Water Intake
2.8K
Osmolality refers to the number of solute particles per kilogram of solvent in a solution. Plasma osmolality specifically indicates the total number of solute particles per kilogram of water in blood plasma. This value reflects the body's hydration status and is tightly regulated through mechanisms controlling water intake and output. While water consumption is a conscious decision, the body has intrinsic regulatory systems to maintain fluid balance. Dehydration, a state of water deficit...
2.8K
Regulation of Water Output
2.3K
The human body predominantly expels water through the urinary system. On average, an individual generates around 1.5 liters of urine each day. This amount can fluctuate based on how well a person is hydrated, but a critical minimum quantity of urine must be produced to ensure the body's proper functioning. Daily, the kidneys remove 600 to 1200 milliosmoles of dissolved substances, effectively excreting excess minerals and water-soluble toxins such as creatinine, urea, and uric acid from the...
2.3K


