📌 Purpose of the Code:
This code 🖥 calculates the infiltration rate using the Curve Number method for a specific patch of land, known as a subcatchment. 🌍💧
📂 Inputs:
infil: 📦 A pointer to the Curve Number infiltration object.tstep: ⏳ The runoff time step in seconds.irate: ☔ The rainfall rate in feet per second.depth: 🌊 The depth of runon + ponded water in feet.
📂 Output:
- Sends back 🚀 the infiltration rate in feet per second.
🔍 Detailed Breakdown:
1️⃣ Initial Setup:
- A few local variables like
F1andf1are initialized. 📊 fagives us the max available infiltration rate, considering both the rainfall 🌧 and the effect of ponded water over time. ⌛
2️⃣ Rainfall Case (irate > ZERO):
- New rainfall? 🌦 Reset values! Resets the cumulative precipitation (
P), infiltration (F), rate (f), and storage depth (Se). - Update the total rainfall amount 📈.
- Compute potential new cumulative infiltration 📉.
- Determine the infiltration rate 💧.
3️⃣ No Rainfall Case (else):
- If water's still around 🌊 (but no new rain), the infiltration rate sticks to the last known value but within storage limits.
- If everything's dry 🌵, the time since the last rain (
T) gets an update.
4️⃣ Infiltration Update:
- Got some infiltration? 💦 Limit the rate considering the max available rate.
- Make sure the total infiltration (
F) gets updated 📝. - If there's a regeneration constant given, the infiltration capacity (
S) takes a dip 📉.
5️⃣ Infiltration Capacity Regeneration:
- No infiltration? Time for the capacity (
S) to regenerate 🌱, based on a given constant and the max storage.
6️⃣ Return Value:
- Update the current infiltration rate (
f1) for the object and send it back! 🎉
📝 Summary: This nifty function 🖥 computes the infiltration rate in a patch of land using the Curve Number method. It dances 💃 between rainfall and no-rainfall scenarios, adjusting the infiltration capacity as needed. And voilà! It sends back the updated rate. 🌧💧🌱
There we go! A sprinkle of emojis for added flair! ✨🎉🎈 Hope it helps! 😊🌟🎈
