Jinsi ya kukokotoa Evapotranspiration
Evapotranspiration ni nini?
Evapotranspiration is water loss from soil/water bodies and plants. It's critical for irrigation design, water balance, and climate analysis.
Mwongozo wa Hatua kwa Hatua
- 1Reference ET (ET₀): well-watered grass, calculated from temperature, humidity, wind, radiation
- 2Actual ET: ET₀ × crop coefficient (varies 0.2-1.2 by crop)
- 3Typical: 100-200 mm/month depending on climate
Mifano Iliyotatuliwa
Ingizo
ET₀ = 5 mm/day, alfalfa (K_c = 1.0)
Matokeo
Daily ET = 5 mm, weekly = 35 mm (irrigation need)
During growing season
Makosa ya Kawaida ya Kuepuka
- ✕Using ET₀ without crop coefficient (over-irrigating)
- ✕Neglecting seasonal variation (summer ET much higher)
Maswali yanayoulizwa mara kwa mara
Why does crop type matter?
Deep-rooted crops (alfalfa) use more water; shallow (lettuce) less. Reflectance and canopy architecture differ.
How do you measure ET?
Lysimeters (soil columns), energy balance models, or empirical equations from climate data.
Je, uko tayari kukokotoa? Jaribu Kikokotoo kisicholipishwa cha Evapotranspiration
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