解释WaPOR水生产率的综合框架
Shadman Veysi1, Eslam Galehban2, Milad Nouri1
1Soil and Water Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.
Heliyon
|September 9, 2024
概括
绘制作物类型的地图对于准确的水生产率分析至关重要. 一个新的无维指数揭示了雨水谷物作为高度水生产,指导在半干旱地区更好的水资源管理.
科学领域:
- 农业科学 农业科学
- 水文学的水文学
- 遥感 遥感 遥感 遥感
背景情况:
- 粮农组织的水生产率开放访问门户 (WaPOR) 提供了有价值的水生产率数据.
- 像总水生产率 (GWP) 和净水生产率 (NWP) 这样的现有指数汇总了作物类型,可能误导决策.
- 半干旱地区的水资源稀缺性需要精细的水生产率评估.
研究的目的:
- 开发一个全面的框架来分析WaPOR水生产力产品.
- 引入一个无维度指数,用于比较不同作物的水生产率.
- 通过作物类型映射,增强对水生产率数据的解释.
主要方法:
- 对伊朗一个半干旱盆地的雨水和灌区域的作物WaPOR数据的分析.
- 总水生产率 (GWP) 和净水生产率 (NWP) 指数的引入和应用.
- 开发和利用一个无维度的水产生产率指数,与作物类型映射集成.
主要成果:
- 观察到传统的GWP/NWP指数与衍生的无维水生产率之间存在显著差异.
- 最初显示高GWP/NWP值的像素有时使用无维指数被识别为低生产率.
- 根据无维指标,雨水作物,特别是谷物,表现出最高的水生产率.
结论:
- 绘制作物类型的地图对于准确的水生产率解释和比较至关重要.
- 无维指数提供了比GWP和NWP更细致的了解作物水生产率.
- 没有维度值低于0.5的区域需要有针对性的干预措施来减少水浪费和提高生产力,特别是在半干旱环境中.
相关概念视频
Precipitation Processes
434
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
434
Vapor Pressure of Fluid
1.3K
The vapor pressure of a fluid is a crucial concept in fluid mechanics, influencing phenomena such as boiling and cavitation. Vapor pressure refers to the pressure exerted by a vapor at a state of thermodynamic equilibrium with its corresponding liquid phase at a specific temperature. It represents the tendency of molecules to escape from the fluid surface into the vapor phase.
When a liquid is placed in a closed container with a small air space, and the space is evacuated, vapor molecules will...
When a liquid is placed in a closed container with a small air space, and the space is evacuated, vapor molecules will...
1.3K
Vapor Pressure
34.7K
When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules move randomly about, they will occasionally collide with the surface of the condensed phase, and in some cases, these collisions will result in the molecules re-entering the condensed phase. The change from the gas phase to the liquid is called condensation. When the rate of condensation becomes equal to the rate of vaporization, neither the amount of the liquid nor the amount of the vapor...
34.7K
Precipitation and Co-precipitation
1.7K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
1.7K
Clausius-Clapeyron Equation
56.4K
The equilibrium between a liquid and its vapor depends on the temperature of the system; a rise in temperature causes a corresponding rise in the vapor pressure of its liquid. The Clausius-Clapeyron equation gives the quantitative relation between a substance’s vapor pressure (P) and its temperature (T); it predicts the rate at which vapor pressure increases per unit increase in temperature.
56.4K
Volatilization
374
Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
374


