Which risk increases following heavy agricultural irrigation over limestone?

💡 Explanation

Increased irrigation saturates the soil and underlying limestone, accelerating chemical weathering; dissolution of the rock causes **collapse doline formation** because the saturated ground loses structural support. Therefore, sinkhole risk accelerates rather than decreases, with seismic impacts and fertility changes not directly linked.

• Which phenomenon causes polygonal ground patterns to form in high-latitude permafrost terrain?
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• Which mechanism causes increased coastal erosion near large river estuaries when upstream dams alter streamflow patterns?
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