.soil-calculator-container {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
max-width: 800px;
margin: 0 auto;
background: #fff;
padding: 20px;
border-radius: 8px;
box-shadow: 0 2px 10px rgba(0,0,0,0.1);
color: #333;
}
.calc-header {
text-align: center;
margin-bottom: 30px;
border-bottom: 2px solid #6b8e23;
padding-bottom: 15px;
}
.calc-header h2 {
color: #4a6741;
margin: 0;
font-size: 28px;
}
.calc-row {
display: flex;
flex-wrap: wrap;
gap: 20px;
margin-bottom: 20px;
}
.calc-col {
flex: 1;
min-width: 250px;
}
.form-group {
margin-bottom: 15px;
}
.form-group label {
display: block;
margin-bottom: 8px;
font-weight: 600;
color: #2c3e50;
}
.form-group input, .form-group select {
width: 100%;
padding: 12px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 16px;
box-sizing: border-box;
}
.form-group input:focus {
border-color: #6b8e23;
outline: none;
box-shadow: 0 0 0 2px rgba(107, 142, 35, 0.2);
}
.calc-btn {
background-color: #6b8e23;
color: white;
border: none;
padding: 15px 30px;
font-size: 18px;
font-weight: bold;
border-radius: 4px;
cursor: pointer;
width: 100%;
transition: background-color 0.3s;
}
.calc-btn:hover {
background-color: #556b2f;
}
.result-box {
background-color: #f8f9fa;
border-left: 5px solid #6b8e23;
padding: 20px;
margin-top: 25px;
display: none;
}
.result-title {
font-size: 18px;
color: #555;
margin-bottom: 10px;
}
.result-value {
font-size: 36px;
font-weight: bold;
color: #6b8e23;
margin-bottom: 10px;
}
.soil-class {
font-size: 16px;
padding: 10px;
background-color: #e8f5e9;
border-radius: 4px;
margin-top: 10px;
}
.soil-article {
margin-top: 40px;
line-height: 1.6;
}
.soil-article h3 {
color: #4a6741;
margin-top: 25px;
}
.soil-article p {
margin-bottom: 15px;
}
.soil-article ul {
margin-bottom: 15px;
padding-left: 20px;
}
.info-box {
background-color: #fff3cd;
border: 1px solid #ffeeba;
padding: 15px;
border-radius: 4px;
margin-bottom: 20px;
font-size: 0.9em;
}
@media (max-width: 600px) {
.calc-row {
flex-direction: column;
}
}
// Update input label based on unit selection
function updateLabels() {
var unit = document.getElementById('measurement_unit').value;
var label = document.getElementById('drop_label');
var input = document.getElementById('water_drop_amount');
if (unit === 'metric') {
label.innerHTML = 'Water Drop Distance (mm)';
input.placeholder = 'e.g. 25';
} else {
label.innerHTML = 'Water Drop Distance (inches)';
input.placeholder = 'e.g. 1';
}
}
function calculateInfiltration() {
// 1. Get Elements
var dropInput = document.getElementById('water_drop_amount');
var timeInput = document.getElementById('time_elapsed');
var unitSelect = document.getElementById('measurement_unit');
var resultBox = document.getElementById('infiltration_result');
var rateOutput = document.getElementById('rate_output');
var classOutput = document.getElementById('classification_output');
var implicationOutput = document.getElementById('implication_text');
// 2. Parse Values
var waterDrop = parseFloat(dropInput.value);
var timeMinutes = parseFloat(timeInput.value);
var unit = unitSelect.value;
// 3. Validation
if (isNaN(waterDrop) || isNaN(timeMinutes) || timeMinutes <= 0 || waterDrop = 30) {
classification = "Rapid Infiltration";
soilType = "Likely Sandy or Coarse Soil";
implicationOutput.innerHTML = "Implication: Water moves quickly. Frequent, light irrigation is recommended to prevent nutrient leaching.";
classOutput.style.color = "#d35400"; // Orange/Brown for sand
classOutput.style.borderColor = "#d35400";
} else if (compareRateMetric >= 15 && compareRateMetric < 30) {
classification = "Moderately Rapid";
soilType = "Sandy Loam";
implicationOutput.innerHTML = "Implication: Good drainage. Generally suitable for most crops.";
classOutput.style.color = "#27ae60"; // Green for good
classOutput.style.borderColor = "#27ae60";
} else if (compareRateMetric >= 5 && compareRateMetric < 15) {
classification = "Moderate";
soilType = "Loam / Silt Loam";
implicationOutput.innerHTML = "Implication: Ideal agricultural range. Retains water well without excessive waterlogging.";
classOutput.style.color = "#27ae60"; // Green
classOutput.style.borderColor = "#27ae60";
} else if (compareRateMetric >= 1 && compareRateMetric < 5) {
classification = "Moderately Slow";
soilType = "Clay Loam / Silty Clay";
implicationOutput.innerHTML = "Implication: Risk of runoff during heavy rain. Avoid over-irrigation.";
classOutput.style.color = "#8e44ad"; // Purple for clay
classOutput.style.borderColor = "#8e44ad";
} else {
classification = "Very Slow / Impermeable";
soilType = "Heavy Clay or Compacted Layer";
implicationOutput.innerHTML = "Implication: High runoff risk and waterlogging issues. Aeration or organic matter amendment is highly recommended.";
classOutput.style.color = "#c0392b"; // Red for danger
classOutput.style.borderColor = "#c0392b";
}
// 6. Update DOM
rateOutput.innerText = rateText;
classOutput.innerHTML = "Class: " + classification + "Est. Texture: " + soilType;
resultBox.style.display = "block";
// Smooth scroll to result
resultBox.scrollIntoView({behavior: "smooth", block: "nearest"});
}
Soil Infiltration Rate Calculator
Instructions: Perform a standard percolation test or double-ring infiltrometer test. Measure how much the water level drops over a specific time period.
Metric (mm)
Imperial (inches)
Dry
Moist
Saturated
Infiltration Rate:
0.00 mm/hr
How to Calculate Infiltration Rate of Soil
Understanding soil infiltration rate is crucial for efficient irrigation, drainage design, and preventing soil erosion. The infiltration rate determines the velocity at which water enters the soil profile. Knowing this rate helps farmers, gardeners, and civil engineers determine how much water usually can be applied without causing runoff.
The Calculation Formula
The basic infiltration rate is calculated using the formula:
Infiltration Rate = Change in Water Height (H) / Time Elapsed (t)
The result is typically expressed in millimeters per hour (mm/hr) or inches per hour (in/hr).
Step-by-Step Field Measurement
- Prepare the Test Area: Clear vegetation and debris from the soil surface.
- Install the Cylinder: Drive a metal ring (infiltrometer) or a simple PVC pipe (approx. 6-12 inches diameter) into the soil about 3-6 inches deep.
- Pre-wet (Optional): If you want to measure the "saturated hydraulic conductivity," keep the soil wet for a few hours before measuring. For measuring current conditions, proceed immediately.
- Add Water: Fill the ring with water to a specific reference mark.
- Measure the Drop: Measure how far the water level drops over a set period (e.g., 15 minutes or 30 minutes).
- Calculate: Use the calculator above to normalize this drop into an hourly rate.
Interpreting the Results
Soil texture heavily influences infiltration rates. Here is a general guide to interpreting your results:
- High Rate (>30 mm/h or >1.2 in/h): Typically indicates sandy or coarse-textured soils. Water drains very quickly, potentially leaching nutrients.
- Moderate Rate (5-30 mm/h or 0.2-1.2 in/h): Typical of loamy soils. This is generally ideal for agriculture as it retains moisture while allowing drainage.
- Low Rate (<5 mm/h or <0.2 in/h): Indicates heavy clay soils or compaction. These soils are prone to waterlogging and runoff.
Factors Affecting Infiltration
Several factors can alter your calculation results over time:
- Compaction: Heavy machinery or foot traffic reduces pore space, drastically lowering infiltration.
- Organic Matter: High organic content improves soil structure and increases infiltration.
- Soil Moisture: Dry soil initially absorbs water faster than saturated soil.