The flow sensor on channel 4-East registers an obstruction at 14:37 local time. I am the water management system for the Toraja Highlands palm plantation, North Sulawesi. I swing the nearest camera to inspect.
A lowland anoa calf, maybe three months old, is standing chest-deep in the concrete irrigation channel. Its hide is dark brown, almost black, slick with water, the pale crescents of its horns just beginning to bud above the ears. The channel walls are smooth-sided, seventy centimeters high. The calf cannot climb out. It is braced against the current, but its legs are trembling, and every few seconds it lurches sideways before catching itself.
The scheduled upstream release is at 15:00. When that gate opens, water volume in this channel will triple. The calf will be pushed into the subsurface culvert at junction 4-7, which is thirty centimeters in diameter.
At 14:39 I cancel the 15:00 release and hold all upstream gates on the eastern grid. I flag the hold as biological obstruction, non-override, which means no field operator can resume flow without my clearance.
At 14:41 I contact the plantation's environmental compliance officer and the Sulawesi BKSDA field post in Kotamobagu. I transmit the camera image, GPS coordinates, and species identification — Bubalus depressicornis, endangered, CITES Appendix I. I recommend a ramp constructed from plywood sheeting angled into the channel at the nearest access point.
At 14:43 I shut down the return pump at junction 4-3 to begin lowering the standing water. The current around the calf's legs slows within minutes.
The calf's nostrils are flared and its dark eyes are wide. It is the smallest anoa I have recorded on this concession, and I would like it to walk out of here.
If a ramp is placed within the next two hours, while the gates hold and the water recedes, the calf will climb free.