No rise in groundwater level even after floods
Alappuzha: A study revealed that ground water level has fallen to 6 metres and wells started to dry up due to the floods and changes in the rainfall. The state groundwater department, Centre for Water Resources Development and Management (CWRDM) and Central Ground Water Board carried out the study.
One Water Year in Kerala is marked from June 1 to May 30. Kerala received 3004 mm rain till March 20, 2019. This means, the state received excess rainfall of 4 mm. But this was not normal rainfall. The rainfall which is supposed to occur within three months was recorded within three days.
Kerala received 414 mm rainfall from August 15 to 17 and that lead to the deluge. According to experts, the soil did not absorb rain as it flowed to the sea. It affected the fall in groundwater level.
In the month of Thulam, the rainfall was reduced by 3 percent. This period includes October, November and December months. The state was supposed to receive 450 mm rain during this season. However, 80 percent of rain occurred in the month of October and rest of the 20 percent was recorded in November and December. Some districts did not receive rainfall in December.
Kasaragod and Palakkad districts recorded 38 percent fall in rain. Meanwhile, a fall of 29 percent in Thrissur and 15 percent in Kozhikode and Thiruvananthapuram was recorded.
The decrease in rain recorded in other districts Kollam -21 pc, Malappuram-11, Wayanad- 9, Idukki- 7, Kannur- 6 and Alappuzha -4.
In the month of January-February, the state was supposed to receive 24 mm summer rain. But only a few districts recorded rainfall once or twice. In the last two months, the summer rain has fallen by 46 percent in the state.
The lack of adequate rainfall is leading the state to draught. There are over 62 lakh wells in the state. Among these, 70 percent have started to dry up. When groundwater in these wells have fallen by 4.5 metres, borewells recorded a fall of 6 metres.
“Excessive fall in groundwater level is disastrous. We need to take immediate action to counter it. Scarcity of water is a serious issue," said Dr VP Dinesan, Principal scientist CWRDM