Pratikshya TL

This is the python file containing TL activity for GIS 714 class.

activities/pratikshya_TL.json

@@ -0,0 +1,19 @@
+{
+  "tasks": [
+    {
+      "layers": [
+        ["d.rast", "map=flow"]
+      ],
+      "base": "elev_lid792_1m",
+      "scanning_params": {
+        "smooth": 10,
+        "zexag": 2,
+        "numscans": 1,
+        "interpolate": true
+      },
+      "analyses": "pratikshya.py",
+      "title": "SIMWE",
+      "instructions": "Change topography and observe changes in surface water flow."
+    }
+  ]
+}

activities/pratikshya_TL.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+
+import os
+
+import grass.script as gs
+
+
+def run_waterflow(scanned_elev, env, **kwargs):
+    # first we need to compute x- and y-derivatives
+    gs.run_command('r.slope.aspect', elevation=scanned_elev, dx='scan_dx', dy='scan_dy', env=env)
+    gs.run_command('r.sim.water', elevation=scanned_elev, dx='scan_dx', dy='scan_dy',
+                   rain_value=150, infil_value=0, man_value=0.05, depth='flow', nwalkers=100000, niterations=30, env=env)
+
+
+def main():
+    env = os.environ.copy()
+    env["GRASS_OVERWRITE"] = "1"
+    elevation = "elev_lid792_1m"
+    elev_resampled = "elev_resampled"
+    gs.run_command("g.region", raster=elevation, res=4, flags="a", env=env)
+    gs.run_command("r.resamp.stats", input=elevation, output=elev_resampled, env=env)
+
+    run_waterflow(scanned_elev=elev_resampled, env=env)
+
+
+if __name__ == "__main__":
+    main()

activities/simple_example.py

@@ -28,6 +28,7 @@ def run_slope(scanned_elev, env, **kwargs):
     gs.run_command("r.slope.aspect", elevation=scanned_elev, slope="slope", env=env)
 
 
+
 def run_contours(scanned_elev, env, **kwargs):
     interval = 5
     gs.run_command(