Fleeing from Sudan's Nuba Mountains

A mother and her children in the Yida refugee camp in South Sudan Many mothers arrive at the camp with undernourished children

They arrive here in small groups - mothers with belongings balanced on weary heads, often carrying a baby too, with a few children dragging tired heels as they struggle to keep up.

The families' water buckets are usually empty after days - sometimes weeks - trekking through the searing heat.

On Wednesday, 616 people reached the Yida refugee camp in South Sudan - the highest number yet recorded - escaping hunger and conflict across the border in South Kordofan, a bitterly contested region of Sudan better known as the Nuba Mountains.

"Hunger," was all 15-year-old Gisma Kafi could muster, sweat beading on her forehead, as she put down the pots and bedding she had been carrying on her head. "We ate bark and leaves," she added, after catching her breath.

Gisma joined a bedraggled crowd slumped on the dry earth outside a straw hut where South Sudanese officials registered each new arrival and weighed the younger children - some with distended bellies and painfully thin limbs.

"When they arrive, the children are very sick due to malnutrition and complications. Every day we are receiving more and more. Others are dying on the way," said Mohammed Sadik, a nutritionist working with the US aid organisation Samaritan's Purse.

Halima Haroun, 30, who arrived two days ago after a 14-day walk, appeared to speak for most of the refugees when she explained why they had decided to abandon their villages in the Nuba Mountains and the nearby caves where many had spent months hiding.

"The Antonovs [Sudanese military planes] bomb us every day. We could not go to work, or to the fields. A bomb killed my husband," she said.

"There are no schools, and no food. I had to leave behind my two youngest children because they could not manage the journey."

New arrivals at the Yida refugee camp in South Sudan Many of the camp's new arrivals have spent weeks hiding in caves before reaching the settlement

More than 23,000 people now live at the Yida camp, and that number is likely to rise sharply in the coming weeks before the annual rains turn the hard earth into swamps and make all movement impossible.

"We are concerned. We're pushing against the clock to get enough food in for the rainy season," said the World Food Programme's Geoff Pinnock, roaming through the camp to check on the new arrivals.

He said he was confident they would be able to feed people at the camp, but was more worried about those remaining inside the Nuba Mountains.

"We're reaching them here. What we are concerned about is the condition north of the border. Over the last two weeks we've seen an increase in the number of arrivals and a deterioration in the conditions of some of those arriving - we're seeing… more people in a relatively bad state of malnutrition."

Mr Pinnock said the conflict was "certainly disrupting livelihoods - they wouldn't be here if they were able to plant crops".

Multiple accounts from refugees and others still inside South Kordofan appear to confirm that the Sudanese military - particularly through its bombing campaign - is seeking to target, terrorise and displace civilians as part of a wider, but currently floundering, attempt to defeat the rebel SPLM-N forces and reassert control.

Map showing position of oilfileds in Sudan, source: Drilling info international

Both Sudan and the South are reliant on their oil revenues, which account for 98% of South Sudan's budget. But the two countries cannot agree how to divide the oil wealth of the former united state. Some 75% of the oil lies in the South but all the pipelines run north. It is feared that disputes over oil could lead the two neighbours to return to war.

Satellite image showing geography of Sudan, source: Nasa

Although they were united for many years, the two Sudans were always very different. The great divide is visible even from space, as this Nasa satellite image shows. The northern states are a blanket of desert, broken only by the fertile Nile corridor. South Sudan is covered by green swathes of grassland, swamps and tropical forest.

Map showing Ethnicity of Sudan, source:

Sudan's arid north is mainly home to Arabic-speaking Muslims. But in South Sudan there is no dominant culture. The Dinkas and the Nuers are the largest of more than 200 ethnic groups, each with its own languages and traditional beliefs, alongside Christianity and Islam.

Map showing infant Mortality in Sudan, source: Sudan household health survey 2006

The health inequalities in Sudan are illustrated by infant mortality rates. In South Sudan, one in 10 children die before their first birthday. Whereas in the more developed northern states, such as Gezira and White Nile, half of those children would be expected to survive.

Map showing percentage of households using improved water and sanitation in Sudan, source: Sudan household health survey 2006

The gulf in water resources between north and south is stark. In Khartoum, River Nile, and Gezira states, two-thirds of people have access to piped drinking water and pit latrines. In the south, boreholes and unprotected wells are the main drinking sources. More than 80% of southerners have no toilet facilities whatsoever.

Map showing percentage of who complete primary school education in Sudan, source: Sudan household health survey 2006

Throughout the two Sudans, access to primary school education is strongly linked to household earnings. In the poorest parts of the south, less than 1% of children finish primary school. Whereas in the wealthier north, up to 50% of children complete primary level education.

Map showing percentage of households with poor food consumption in Sudan, source: Sudan household health survey 2006

Conflict and poverty are the main causes of food insecurity in both countries. In Sudan, many of the residents of war-affected Darfur and the border states of Blue Nile and South Kordofan, depend on food aid. The UN said about 2.8m people in South Sudan would require food aid in 2013. The northern states tend to be wealthier, more urbanised and less reliant on agriculture.

Andrew Harding, Africa correspondent Article written by Andrew Harding Andrew Harding Africa correspondent

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