Groundwater contamination from the 2006 Sidoarjo mudflow in East Java, Indonesia, continues to impact residents in the Porong district. While 9-to-11-meter embankments restrain the mud above ground, sub-surface seepage is contaminating local wells and forcing the abandonment of hundreds of hectares of rice fields.
How is the mudflow affecting local water supplies?
In Glagaharum village, 47-year-old Ahmad Solihudin waits for a water vendor’s motorcycle to provide his family’s daily clean water. He pays Rp 15,000 for three 25-liter plastic containers.
While authorities have built embankments 9 to 11 meters high to manage the mudflow above ground, the impact remains active beneath the surface. The mud continues to seep through the soil, damaging groundwater supplies in surrounding communities.
“Since the disaster, the well water here has tasted salty. It’s greasy too, like it contains oil. Even soap can’t wash it away. During the dry season, the water quality gets even worse and it turns black,” Solihudin said.
Because of the poor water quality, residents like Solihudin must spend a significant portion of their income on water delivered by traveling vendors. These supplies are brought from outside the regency at a cost of up to Rp 450,000 per month.
What is the impact on agriculture in the region?
The environmental damage extends to the local food supply. Hundreds of hectares of rice fields that previously yielded abundant harvests are now abandoned around the mudflow area.
Farmers report that saline groundwater causes newly planted crops to wither within days of planting.
What could happen next?
The continued seepage of mud beneath the soil may lead to further degradation of groundwater quality in the Porong district. This could potentially increase the monthly cost of living for families who rely on external water vendors.
Additionally, the presence of saline groundwater may lead to the abandonment of even more agricultural land if the soil conditions do not improve.
Frequently Asked Questions
- How high are the embankments built to contain the mudflow?
Authorities have constructed embankments that rise between 9 and 11 meters high. - What are the specific characteristics of the contaminated well water?
According to Ahmad Solihudin, the water tastes salty, feels greasy like it contains oil, and can turn black during the dry season. - How has the mudflow affected local rice farming?
Saline groundwater causes newly planted crops to wither within days, and hundreds of hectares of rice fields have been abandoned.
How should authorities address the long-term sub-surface environmental impacts of such disasters?
