Drip Irrigation: Can Pakistan Make its Deserts Bloom?

[Riaz Haq]

Large tracts of desert in Cholistan, Kharan and Thar land lay barren in Pakistan today. Can some parts of these deserts be made to bloom given the worsening water crisis in the country with per capita water availability approaching 900 cubic meters? How does Pakistan improve long term food security for its growing population? The answer to both lies in efficient water management through effective drip irrigation.

Drip Irrigation

What is Drip Irrigation:

Drip irrigation is a micro-irrigation system using tubing that saves water and nutrients by allowing water to drip slowly into the roots of plants, either from above the soil surface or buried below the surface. It puts water directly into the roots and minimizes evaporation.

Water mixed with fertilizer is carried out through tubes which release a small amounts of water per minute directly to the roots of each plant. Precision watering cuts evaporation, run off, and waste.

More Crop Per Drop:

Agriculture uses over 90% of all available fresh water in Pakistan. "More crop per drop" program focuses on improving water use efficiency by promoting drip and sprinkler irrigation in agriculture in Pakistan.

The Punjab government started this effort with the World Bank with $250 million investment.  The World Bank is now providing additional $130 million financing for the Punjab Irrigated Agriculture Productivity Improvement Program Phase-I.

The project is the Punjab Government's initiative called High-Efficiency Irrigation Systems (HEIS) to more than doubles the efficiency of water use. Under the project, drip irrigation systems have been installed on about 26,000 acres, and 5,000 laser leveling units have been provided. The additional financing will ensure completion of 120,000 acres with ponds in saline areas and for rainwater harvesting, and filtration systems for drinking water where possible, according to the World Bank.

Cost of Drip Irrigation System:

Most crops are not irrigated with the drip method due to higher costs. In the United States and Spain, where the technology is used most, it comprises 6.75 and 2.75 percent of the total irrigated area, respectively, according to the International Commission on Irrigation and Drainage. Farmers are offered subsidies to encourage the use of drip irrigation in most countries as a way of conserving precious water.

Subsidies in Punjab, Pakistan:

Punjab provincial government is subsidizing up to 60% of the cost of installing new drip irrigation systems, according to Business Recorder newspaper.  Director General Agriculture (Water Management) Malik Muhammad Akram said that latest irrigation techniques ensure availability of water and fertilizer in time to the plants and it also ensure uniform supply of these two major ingredients to all the plants in a field. It helps attaining more per acre yield with minimum agricultural inputs, he added, according to the paper.

There's at least one example of public-private partnership to promote drip irrigation in Sheikhupura near Lahore. The installation has been carried out by Nestlé Pakistan in collaboration with the Government of Punjab, covering 40% and 60% of the farmer’s cost respectively. The Agricultural Efficiency Project was initiated in the year 2017 and has so far covered 109 acres of land in 2018 with an estimated 280 million liters of water saved, according to a Nestle press release.

Using drip irrigation, farmers can save up to 95% of water and reduce fertilizer use, compared to surface irrigation, according to Malik Mohammad Akram. In flood irrigation – the traditional method of agriculture in the region – a farmer uses 412,000 liters per acre, while using drip irrigation the same land can be irrigated with just 232,000 liters of water, he explained to Zofeen Ibrahim of The Third Pole that covers Asia's water crisis.

Success Stories:

Writing for The Third Pole,  Zofeen Ebrahim has cited a couple of success stories of farmers receiving Punjab government's drip irrigation subsidies: The stories of ex IT Engineer Hasan Abdullah and Infiniti Agro and Livestock Farm.

Hasan Abdulla is has planted an orchard on his 40-acre plot in Cholistan Desert. He has orange, lemon olive trees which are now fruiting three years after planting. He is among the first farmers experimenting with drip irrigation.While Abdullah was saving water, the cost of diesel for running water pump was proving astronomical. It would have been difficult for Abdullah to continue farming with drip irrigation had the government not announced an 80% subsidy on solar power plants for farmers in 2018. He promptly took it up.

Asif Riaz Taj, who manages Infiniti Agro and Livestock Farm in Bahawalpur, heard of Abdulla's drip irrigation project and paid him a visit. He like it and decided to follow the example.  Now in their fourth year, the Infiniti orchards have started fruiting over 70 acres. But it will not be before its sixth year, Taj said, that they will “break even”. The drip irrigation and solar plant was installed at a cost of PKR 25 million (USD 174,000), and the monthly running cost of this farm is almost PKR 4 million (USD 28,000).

Summary:

Pakistan faces a severe water crisis that threatens the nation's long term food security.  The country needs to expand area under cultivation while efficiently managing its precious water resources. It needs to make parts of its deserts bloom. The best way to do it efficient water management through effective drip irrigation. Such projects are expensive to implement. The Punjab government is offering up to 60% subsidy to farmers to encourage wider use of drip irrigation.

Related Links:

Haq's Musings

South Asia Investor Review

Pakistan Water Crisis: Facts and Myths 

Groundwater Depletion in Pakistan

Water Scarce Pakistan

Cycles of Drought and Floods in Pakistan

Pakistan to Build Massive Dams

Dust Bowl in Thar Desert Region

Dasht River in Balochistan

Hindus in Pakistan

Riaz Haq's YouTube Channel

PakAlumni Social Network

[Riaz Haq]

Tarbela Dam is 96 feet away from touching its maximum level of 1550 feet as it has already attained level of 1494 feet on Friday against 1398 feet a day earlier, said sources from Pakistan Meteorological Department (PMD).

https://www.brecorder.com/news/40186234

They said the Dam had registered a gain of 96 feet in last 10 days. It may be noted that the Dam was at the level of 1405 feet on 1st of July when monsoon weather had hit the country. In other words, said the sources, the Dam was possessing one percent storage of its total capacity on 1st of May which has risen to 49.34 percent on Friday. The dam has been filled by half, they added.

Mangla Dam, on the other hand, was carrying 4.57 percent storage of its capacity, which has reached 13.24 percent on Friday. So far as the water level is concerned, Mangla was at the level of 1098 feet, which has reached 1126.7 feet. The maximum conservation level of Mangla Dam is 1242 feet.

Director PMD Shahid Abbas confirmed the development, saying that Mangla has been filled by 13 percent and Tarbela by 49 percent. According to him, Tarbela could be filled to the maximum conservation level before 20th of July as there is no need of irrigation water for the agriculture of Sindh and Balochistan provinces due to heavy spells of rains.

At present, he said, 150,000 cusecs water is being released from the dam on daily basis, which is more than the agricultural need of the two provinces. The other purpose being met by this huge release of water is to generation of some 3000 plus megawatt electricity from the Dam, he added.

According to him, since the relevant authorities have no idea as how water is expected from the hilly sources, therefore, they are not in a hurry to fill it up. An early filling up of this dam may lead to heavy release of water in case of flood like situation after heavy rains in the hilly areas, he added. He said, another reason of releasing excessive water is the non-availability of storage capacity. He said the water being released at present is enough to fill another two dams of similar capacity in the country.

Meanwhile, the monsoon waves have proceeded to Sindh, particularly Karachi, to shower rain from Saturday night. Also, Director PMD said, the current monsoon waves would bring heavy downpour in Balochistan and lower parts of Southern Punjab for the next three days. The monsoon waves are likely to revert to the catchment areas of all the five rivers from 20th July until 22nd of July, including central Punjab and upper parts of the country.

[Riaz Haq]

Shifting sands: why the Thar desert on the borders of India and Pakistan is getting greener

https://geographical.co.uk/science-environment/sifting-sands-why-th...

Their research, published in the journal Earth’s Future, isn’t the first to suggest that climate change might be turning the Indian subcontinent’s northwest green. In 2017, scientists at the Center for Global Change Science at the Massachusetts Institute of Technology revealed that, since 2002, there has been a ‘revival’ of the Indian summer monsoon – a reversal of a 50-year dry period that brought relatively little rain to northern and central India. More rain, their study showed, was yet to come.

According to climatologist Bhupendra Goswami, by the end of the century we can expect to see a 150–200 per cent increase in mean rainfall in northwestern India. The findings are ‘counterintuitive’, he says; normally, there is an expectation that climate change will make wet areas wetter and dry areas drier. However, Goswami and his colleagues found that as rising greenhouse gas emissions continue to heat the planet, the Indian Ocean will warm unevenly, heating up faster in the west. It’s this imbalance, they explain, that is causing the monsoon to shift.

https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2022EF003459

[Riaz Haq]

Climate Change and Potential Demise of the Indian Deserts
P. V. Rajesh, B. N. Goswami
First published: 31 July 2023

https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2022EF003459

Abstract
In contrast to the “wet gets wetter and dry gets drier” paradigm, here, using observations and climate model simulations, we show that the mean rainfall over the semi-arid northwest parts of India and Pakistan has increased by 10%–50% during 1901–2015 and is expected to increase by 50%–200% under moderate greenhouse gas (GHG) scenarios. The GHG forcing primarily drives the westward expansion of the Indian summer monsoon rainfall (ISMR) and is facilitated by a westward expansion of the Indian Ocean (IO) warm pool. Mechanistically, the westward expansion of ISMR is a consequence of the episodic genesis over IO and the northward propagation of an expanded Inter-Tropical Convergence Zone on a sub-seasonal time scale. While an adaptation strategy to increased hydrological disasters is a must, harnessing the augmented rainfall would lead to a substantial boost in food productivity, bringing transformative changes in the socio-economic condition of people in the region.

Key Points
Global warming could potentially cause a westward expansion of the Indian monsoon

Rainfall in northwest India and Pakistan has increased and will continue to rise due to greenhouse gases

Increased monsoon rainfall can improve food productivity and socio-economic conditions in the region

Plain Language Summary
An apparent eastward shift of the Indian monsoon has led to the arid conditions in the west and north-west regions of India where monsoon was once active, and the Indus Valley civilizations thrived (5,300–3,300-year BP). A reversal of the process and a westward expansion of the present-day Indian monsoon would transform the west and north-west India to a humid “monsoonal” climate and provide food security to the expanding population of the country. The present study shows that the Indian monsoon is indeed expanding to the west with 10% decrease of mean rainfall in the northeast and 25% increase in the west and north-west during the historical period with a potential of 50%–100% increase in the north-west under SSP2–4.5. Harvesting the increased rainfall has the potential for significant increase in food productivity bringing in transformative changes in the socio-economic condition of people of the region.